21355808

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1061}}^1$

素因数の和:1125

約数の個数: 48

約数和(自身を含む): 45763704

約数和(自身を除く): 24407896

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 37, 68, 74, 136, 148, 272, 296, 544, 592, 629, 1061, 1184, 1258, 2122, 2516, 4244, 5032, 8488, 10064, 16976, 18037, 20128, 33952, 36074, 39257, 72148, 78514, 144296, 157028, 288592, 314056, 577184, 628112, 667369, 1256224, 1334738, 2669476, 5338952, 10677904, 21355808]

約数ペア:

[(1, 21355808), (2, 10677904), (4, 5338952), (8, 2669476), (16, 1334738), (17, 1256224), (32, 667369), (34, 628112), (37, 577184), (68, 314056), (74, 288592), (136, 157028), (148, 144296), (272, 78514), (296, 72148), (544, 39257), (592, 36074), (629, 33952), (1061, 20128), (1184, 18037), (1258, 16976), (2122, 10064), (2516, 8488), (4244, 5032)]