21977120

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{12487}}^1$

素因数の和:12513

約数の個数: 48

約数和(自身を含む): 56645568

約数和(自身を除く): 34668448

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, 12487, 24974, 49948, 62435, 99896, 124870, 137357, 199792, 249740, 274714, 399584, 499480, 549428, 686785, 998960, 1098856, 1373570, 1997920, 2197712, 2747140, 4395424, 5494280, 10988560, 21977120]

約数ペア:

[(1, 21977120), (2, 10988560), (4, 5494280), (5, 4395424), (8, 2747140), (10, 2197712), (11, 1997920), (16, 1373570), (20, 1098856), (22, 998960), (32, 686785), (40, 549428), (44, 499480), (55, 399584), (80, 274714), (88, 249740), (110, 199792), (160, 137357), (176, 124870), (220, 99896), (352, 62435), (440, 49948), (880, 24974), (1760, 12487)]