20129120

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11437}}^1$

素因数の和:11463

約数の個数: 48

約数和(自身を含む): 51882768

約数和(自身を除く): 31753648

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11437, 22874, 45748, 57185, 91496, 114370, 125807, 182992, 228740, 251614, 365984, 457480, 503228, 629035, 914960, 1006456, 1258070, 1829920, 2012912, 2516140, 4025824, 5032280, 10064560, 20129120]

約数ペア:

[(1, 20129120), (2, 10064560), (4, 5032280), (5, 4025824), (8, 2516140), (10, 2012912), (11, 1829920), (16, 1258070), (20, 1006456), (22, 914960), (32, 629035), (40, 503228), (44, 457480), (55, 365984), (80, 251614), (88, 228740), (110, 182992), (160, 125807), (176, 114370), (220, 91496), (352, 57185), (440, 45748), (880, 22874), (1760, 11437)]