21082160

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23957}}^1$

素因数の和:23981

約数の個数: 40

約数和(自身を含む): 53474256

約数和(自身を除く): 32392096

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23957, 47914, 95828, 119785, 191656, 239570, 263527, 383312, 479140, 527054, 958280, 1054108, 1317635, 1916560, 2108216, 2635270, 4216432, 5270540, 10541080, 21082160]

約数ペア:

[(1, 21082160), (2, 10541080), (4, 5270540), (5, 4216432), (8, 2635270), (10, 2108216), (11, 1916560), (16, 1317635), (20, 1054108), (22, 958280), (40, 527054), (44, 479140), (55, 383312), (80, 263527), (88, 239570), (110, 191656), (176, 119785), (220, 95828), (440, 47914), (880, 23957)]