20513220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^2$

素因数の和:79

約数の個数: 216

約数和(自身を含む): 75507264

約数和(自身を除く): 54994044

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 17, 20, 21, 26, 28, 30, 34, 35, 39, 42, 51, 52, 60, 65, 68, 70, 78, 84, 85, 91, 102, 105, 119, 130, 140, 156, 169, 170, 182, 195, 204, 210, 221, 238, 255, 260, 273, 289, 338, 340, 357, 364, 390, 420, 442, 455, 476, 507, 510, 546, 578, 595, 663, 676, 714, 780, 845, 867, 884, 910, 1014, 1020, 1092, 1105, 1156, 1183, 1190, 1326, 1365, 1428, 1445, 1547, 1690, 1734, 1785, 1820, 2023, 2028, 2210, 2366, 2380, 2535, 2652, 2730, 2873, 2890, 3094, 3315, 3380, 3468, 3549, 3570, 3757, 4046, 4335, 4420, 4641, 4732, 5070, 5460, 5746, 5780, 5915, 6069, 6188, 6630, 7098, 7140, 7514, 7735, 8092, 8619, 8670, 9282, 10115, 10140, 11271, 11492, 11830, 12138, 13260, 14196, 14365, 15028, 15470, 17238, 17340, 17745, 18564, 18785, 20111, 20230, 22542, 23205, 23660, 24276, 26299, 28730, 30345, 30940, 34476, 35490, 37570, 40222, 40460, 43095, 45084, 46410, 48841, 52598, 56355, 57460, 60333, 60690, 70980, 75140, 78897, 80444, 86190, 92820, 97682, 100555, 105196, 112710, 120666, 121380, 131495, 146523, 157794, 172380, 195364, 201110, 225420, 241332, 244205, 262990, 293046, 301665, 315588, 341887, 394485, 402220, 488410, 525980, 586092, 603330, 683774, 732615, 788970, 976820, 1025661, 1206660, 1367548, 1465230, 1577940, 1709435, 2051322, 2930460, 3418870, 4102644, 5128305, 6837740, 10256610, 20513220]

約数ペア:

[(1, 20513220), (2, 10256610), (3, 6837740), (4, 5128305), (5, 4102644), (6, 3418870), (7, 2930460), (10, 2051322), (12, 1709435), (13, 1577940), (14, 1465230), (15, 1367548), (17, 1206660), (20, 1025661), (21, 976820), (26, 788970), (28, 732615), (30, 683774), (34, 603330), (35, 586092), (39, 525980), (42, 488410), (51, 402220), (52, 394485), (60, 341887), (65, 315588), (68, 301665), (70, 293046), (78, 262990), (84, 244205), (85, 241332), (91, 225420), (102, 201110), (105, 195364), (119, 172380), (130, 157794), (140, 146523), (156, 131495), (169, 121380), (170, 120666), (182, 112710), (195, 105196), (204, 100555), (210, 97682), (221, 92820), (238, 86190), (255, 80444), (260, 78897), (273, 75140), (289, 70980), (338, 60690), (340, 60333), (357, 57460), (364, 56355), (390, 52598), (420, 48841), (442, 46410), (455, 45084), (476, 43095), (507, 40460), (510, 40222), (546, 37570), (578, 35490), (595, 34476), (663, 30940), (676, 30345), (714, 28730), (780, 26299), (845, 24276), (867, 23660), (884, 23205), (910, 22542), (1014, 20230), (1020, 20111), (1092, 18785), (1105, 18564), (1156, 17745), (1183, 17340), (1190, 17238), (1326, 15470), (1365, 15028), (1428, 14365), (1445, 14196), (1547, 13260), (1690, 12138), (1734, 11830), (1785, 11492), (1820, 11271), (2023, 10140), (2028, 10115), (2210, 9282), (2366, 8670), (2380, 8619), (2535, 8092), (2652, 7735), (2730, 7514), (2873, 7140), (2890, 7098), (3094, 6630), (3315, 6188), (3380, 6069), (3468, 5915), (3549, 5780), (3570, 5746), (3757, 5460), (4046, 5070), (4335, 4732), (4420, 4641)]