21270808

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{227}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 46539360

約数和(自身を除く): 25268552

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 53, 68, 104, 106, 136, 212, 221, 227, 424, 442, 454, 689, 884, 901, 908, 1378, 1768, 1802, 1816, 2756, 2951, 3604, 3859, 5512, 5902, 7208, 7718, 11713, 11804, 12031, 15436, 23426, 23608, 24062, 30872, 46852, 48124, 50167, 93704, 96248, 100334, 156403, 200668, 204527, 312806, 401336, 409054, 625612, 818108, 1251224, 1636216, 2658851, 5317702, 10635404, 21270808]

約数ペア:

[(1, 21270808), (2, 10635404), (4, 5317702), (8, 2658851), (13, 1636216), (17, 1251224), (26, 818108), (34, 625612), (52, 409054), (53, 401336), (68, 312806), (104, 204527), (106, 200668), (136, 156403), (212, 100334), (221, 96248), (227, 93704), (424, 50167), (442, 48124), (454, 46852), (689, 30872), (884, 24062), (901, 23608), (908, 23426), (1378, 15436), (1768, 12031), (1802, 11804), (1816, 11713), (2756, 7718), (2951, 7208), (3604, 5902), (3859, 5512)]