19787984

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{17419}}^1$

素因数の和:17498

約数の個数: 20

約数和(自身を含む): 38881440

約数和(自身を除く): 19093456

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 17419, 34838, 69676, 139352, 278704, 1236749, 2473498, 4946996, 9893992, 19787984]

約数ペア:

[(1, 19787984), (2, 9893992), (4, 4946996), (8, 2473498), (16, 1236749), (71, 278704), (142, 139352), (284, 69676), (568, 34838), (1136, 17419)]