81131984

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{71419}}^1$

素因数の和:71498

約数の個数: 20

約数和(自身を含む): 159409440

約数和(自身を除く): 78277456

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 71419, 142838, 285676, 571352, 1142704, 5070749, 10141498, 20282996, 40565992, 81131984]

約数ペア:

[(1, 81131984), (2, 40565992), (4, 20282996), (8, 10141498), (16, 5070749), (71, 1142704), (142, 571352), (284, 285676), (568, 142838), (1136, 71419)]