20397780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{379}}^1$

素因数の和:430

約数の個数: 144

約数和(自身を含む): 69713280

約数和(自身を除く): 49315500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 23, 26, 30, 36, 39, 45, 46, 52, 60, 65, 69, 78, 90, 92, 115, 117, 130, 138, 156, 180, 195, 207, 230, 234, 260, 276, 299, 345, 379, 390, 414, 460, 468, 585, 598, 690, 758, 780, 828, 897, 1035, 1137, 1170, 1196, 1380, 1495, 1516, 1794, 1895, 2070, 2274, 2340, 2691, 2990, 3411, 3588, 3790, 4140, 4485, 4548, 4927, 5382, 5685, 5980, 6822, 7580, 8717, 8970, 9854, 10764, 11370, 13455, 13644, 14781, 17055, 17434, 17940, 19708, 22740, 24635, 26151, 26910, 29562, 34110, 34868, 43585, 44343, 49270, 52302, 53820, 59124, 68220, 73905, 78453, 87170, 88686, 98540, 104604, 113321, 130755, 147810, 156906, 174340, 177372, 221715, 226642, 261510, 295620, 313812, 339963, 392265, 443430, 453284, 523020, 566605, 679926, 784530, 886860, 1019889, 1133210, 1359852, 1569060, 1699815, 2039778, 2266420, 3399630, 4079556, 5099445, 6799260, 10198890, 20397780]

約数ペア:

[(1, 20397780), (2, 10198890), (3, 6799260), (4, 5099445), (5, 4079556), (6, 3399630), (9, 2266420), (10, 2039778), (12, 1699815), (13, 1569060), (15, 1359852), (18, 1133210), (20, 1019889), (23, 886860), (26, 784530), (30, 679926), (36, 566605), (39, 523020), (45, 453284), (46, 443430), (52, 392265), (60, 339963), (65, 313812), (69, 295620), (78, 261510), (90, 226642), (92, 221715), (115, 177372), (117, 174340), (130, 156906), (138, 147810), (156, 130755), (180, 113321), (195, 104604), (207, 98540), (230, 88686), (234, 87170), (260, 78453), (276, 73905), (299, 68220), (345, 59124), (379, 53820), (390, 52302), (414, 49270), (460, 44343), (468, 43585), (585, 34868), (598, 34110), (690, 29562), (758, 26910), (780, 26151), (828, 24635), (897, 22740), (1035, 19708), (1137, 17940), (1170, 17434), (1196, 17055), (1380, 14781), (1495, 13644), (1516, 13455), (1794, 11370), (1895, 10764), (2070, 9854), (2274, 8970), (2340, 8717), (2691, 7580), (2990, 6822), (3411, 5980), (3588, 5685), (3790, 5382), (4140, 4927), (4485, 4548)]