21661328

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{467}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 45497088

約数和(自身を除く): 23835760

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 223, 446, 467, 892, 934, 1784, 1868, 2899, 3568, 3736, 5798, 6071, 7472, 11596, 12142, 23192, 24284, 46384, 48568, 97136, 104141, 208282, 416564, 833128, 1353833, 1666256, 2707666, 5415332, 10830664, 21661328]

約数ペア:

[(1, 21661328), (2, 10830664), (4, 5415332), (8, 2707666), (13, 1666256), (16, 1353833), (26, 833128), (52, 416564), (104, 208282), (208, 104141), (223, 97136), (446, 48568), (467, 46384), (892, 24284), (934, 23192), (1784, 12142), (1868, 11596), (2899, 7472), (3568, 6071), (3736, 5798)]