215978399

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1\times {\mathrm{367}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 276971520

約数和(自身を除く): 60993121

約数列:

[1, 7, 13, 29, 91, 203, 223, 367, 377, 1561, 2569, 2639, 2899, 4771, 6467, 10643, 20293, 33397, 45269, 74501, 81841, 84071, 138359, 572887, 588497, 968513, 1063933, 2373389, 7447531, 16613723, 30854057, 215978399]

約数ペア:

[(1, 215978399), (7, 30854057), (13, 16613723), (29, 7447531), (91, 2373389), (203, 1063933), (223, 968513), (367, 588497), (377, 572887), (1561, 138359), (2569, 84071), (2639, 81841), (2899, 74501), (4771, 45269), (6467, 33397), (10643, 20293)]