21255780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1$

素因数の和:278

約数の個数: 192

約数和(自身を含む): 77898240

約数和(自身を除く): 56642460

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, 170, 182, 195, 204, 210, 221, 229, 238, 255, 260, 273, 340, 357, 364, 390, 420, 442, 455, 458, 476, 510, 546, 595, 663, 687, 714, 780, 884, 910, 916, 1020, 1092, 1105, 1145, 1190, 1326, 1365, 1374, 1428, 1547, 1603, 1785, 1820, 2210, 2290, 2380, 2652, 2730, 2748, 2977, 3094, 3206, 3315, 3435, 3570, 3893, 4420, 4580, 4641, 4809, 5460, 5954, 6188, 6412, 6630, 6870, 7140, 7735, 7786, 8015, 8931, 9282, 9618, 11679, 11908, 13260, 13740, 14885, 15470, 15572, 16030, 17862, 18564, 19236, 19465, 20839, 23205, 23358, 24045, 27251, 29770, 30940, 32060, 35724, 38930, 41678, 44655, 46410, 46716, 48090, 50609, 54502, 58395, 59540, 62517, 77860, 81753, 83356, 89310, 92820, 96180, 101218, 104195, 109004, 116790, 125034, 136255, 151827, 163506, 178620, 202436, 208390, 233580, 250068, 253045, 272510, 303654, 312585, 327012, 354263, 408765, 416780, 506090, 545020, 607308, 625170, 708526, 759135, 817530, 1012180, 1062789, 1250340, 1417052, 1518270, 1635060, 1771315, 2125578, 3036540, 3542630, 4251156, 5313945, 7085260, 10627890, 21255780]

約数ペア:

[(1, 21255780), (2, 10627890), (3, 7085260), (4, 5313945), (5, 4251156), (6, 3542630), (7, 3036540), (10, 2125578), (12, 1771315), (13, 1635060), (14, 1518270), (15, 1417052), (17, 1250340), (20, 1062789), (21, 1012180), (26, 817530), (28, 759135), (30, 708526), (34, 625170), (35, 607308), (39, 545020), (42, 506090), (51, 416780), (52, 408765), (60, 354263), (65, 327012), (68, 312585), (70, 303654), (78, 272510), (84, 253045), (85, 250068), (91, 233580), (102, 208390), (105, 202436), (119, 178620), (130, 163506), (140, 151827), (156, 136255), (170, 125034), (182, 116790), (195, 109004), (204, 104195), (210, 101218), (221, 96180), (229, 92820), (238, 89310), (255, 83356), (260, 81753), (273, 77860), (340, 62517), (357, 59540), (364, 58395), (390, 54502), (420, 50609), (442, 48090), (455, 46716), (458, 46410), (476, 44655), (510, 41678), (546, 38930), (595, 35724), (663, 32060), (687, 30940), (714, 29770), (780, 27251), (884, 24045), (910, 23358), (916, 23205), (1020, 20839), (1092, 19465), (1105, 19236), (1145, 18564), (1190, 17862), (1326, 16030), (1365, 15572), (1374, 15470), (1428, 14885), (1547, 13740), (1603, 13260), (1785, 11908), (1820, 11679), (2210, 9618), (2290, 9282), (2380, 8931), (2652, 8015), (2730, 7786), (2748, 7735), (2977, 7140), (3094, 6870), (3206, 6630), (3315, 6412), (3435, 6188), (3570, 5954), (3893, 5460), (4420, 4809), (4580, 4641)]