21081712

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:433

約数の個数: 40

約数和(自身を含む): 42408000

約数和(自身を除く): 21326288

約数列:

[1, 2, 4, 8, 16, 37, 74, 148, 149, 239, 296, 298, 478, 592, 596, 956, 1192, 1912, 2384, 3824, 5513, 8843, 11026, 17686, 22052, 35372, 35611, 44104, 70744, 71222, 88208, 141488, 142444, 284888, 569776, 1317607, 2635214, 5270428, 10540856, 21081712]

約数ペア:

[(1, 21081712), (2, 10540856), (4, 5270428), (8, 2635214), (16, 1317607), (37, 569776), (74, 284888), (148, 142444), (149, 141488), (239, 88208), (296, 71222), (298, 70744), (478, 44104), (592, 35611), (596, 35372), (956, 22052), (1192, 17686), (1912, 11026), (2384, 8843), (3824, 5513)]