20656020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:310

約数の個数: 192

約数和(自身を含む): 76640256

約数和(自身を除く): 55984236

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 17, 20, 21, 22, 28, 30, 33, 34, 35, 42, 44, 51, 55, 60, 66, 68, 70, 77, 84, 85, 102, 105, 110, 119, 132, 140, 154, 165, 170, 187, 204, 210, 220, 231, 238, 255, 263, 308, 330, 340, 357, 374, 385, 420, 462, 476, 510, 526, 561, 595, 660, 714, 748, 770, 789, 924, 935, 1020, 1052, 1122, 1155, 1190, 1309, 1315, 1428, 1540, 1578, 1785, 1841, 1870, 2244, 2310, 2380, 2618, 2630, 2805, 2893, 3156, 3570, 3682, 3740, 3927, 3945, 4471, 4620, 5236, 5260, 5523, 5610, 5786, 6545, 7140, 7364, 7854, 7890, 8679, 8942, 9205, 11046, 11220, 11572, 13090, 13413, 14465, 15708, 15780, 17358, 17884, 18410, 19635, 20251, 22092, 22355, 26180, 26826, 27615, 28930, 31297, 34716, 36820, 39270, 40502, 43395, 44710, 49181, 53652, 55230, 57860, 60753, 62594, 67065, 78540, 81004, 86790, 89420, 93891, 98362, 101255, 110460, 121506, 125188, 134130, 147543, 156485, 173580, 187782, 196724, 202510, 243012, 245905, 268260, 295086, 303765, 312970, 344267, 375564, 405020, 469455, 491810, 590172, 607530, 625940, 688534, 737715, 938910, 983620, 1032801, 1215060, 1377068, 1475430, 1721335, 1877820, 2065602, 2950860, 3442670, 4131204, 5164005, 6885340, 10328010, 20656020]

約数ペア:

[(1, 20656020), (2, 10328010), (3, 6885340), (4, 5164005), (5, 4131204), (6, 3442670), (7, 2950860), (10, 2065602), (11, 1877820), (12, 1721335), (14, 1475430), (15, 1377068), (17, 1215060), (20, 1032801), (21, 983620), (22, 938910), (28, 737715), (30, 688534), (33, 625940), (34, 607530), (35, 590172), (42, 491810), (44, 469455), (51, 405020), (55, 375564), (60, 344267), (66, 312970), (68, 303765), (70, 295086), (77, 268260), (84, 245905), (85, 243012), (102, 202510), (105, 196724), (110, 187782), (119, 173580), (132, 156485), (140, 147543), (154, 134130), (165, 125188), (170, 121506), (187, 110460), (204, 101255), (210, 98362), (220, 93891), (231, 89420), (238, 86790), (255, 81004), (263, 78540), (308, 67065), (330, 62594), (340, 60753), (357, 57860), (374, 55230), (385, 53652), (420, 49181), (462, 44710), (476, 43395), (510, 40502), (526, 39270), (561, 36820), (595, 34716), (660, 31297), (714, 28930), (748, 27615), (770, 26826), (789, 26180), (924, 22355), (935, 22092), (1020, 20251), (1052, 19635), (1122, 18410), (1155, 17884), (1190, 17358), (1309, 15780), (1315, 15708), (1428, 14465), (1540, 13413), (1578, 13090), (1785, 11572), (1841, 11220), (1870, 11046), (2244, 9205), (2310, 8942), (2380, 8679), (2618, 7890), (2630, 7854), (2805, 7364), (2893, 7140), (3156, 6545), (3570, 5786), (3682, 5610), (3740, 5523), (3927, 5260), (3945, 5236), (4471, 4620)]