21574480

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4421}}^1$

素因数の和:4495

約数の個数: 40

約数和(自身を含む): 50994504

約数和(自身を除く): 29420024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4421, 4880, 8842, 17684, 22105, 35368, 44210, 70736, 88420, 176840, 269681, 353680, 539362, 1078724, 1348405, 2157448, 2696810, 4314896, 5393620, 10787240, 21574480]

約数ペア:

[(1, 21574480), (2, 10787240), (4, 5393620), (5, 4314896), (8, 2696810), (10, 2157448), (16, 1348405), (20, 1078724), (40, 539362), (61, 353680), (80, 269681), (122, 176840), (244, 88420), (305, 70736), (488, 44210), (610, 35368), (976, 22105), (1220, 17684), (2440, 8842), (4421, 4880)]