21907172

素因数分解:

$2^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 23452828

約数列:

[1, 2, 4, 7, 14, 28, 59, 89, 118, 149, 178, 236, 298, 356, 413, 596, 623, 826, 1043, 1246, 1652, 2086, 2492, 4172, 5251, 8791, 10502, 13261, 17582, 21004, 26522, 35164, 36757, 53044, 61537, 73514, 92827, 123074, 147028, 185654, 246148, 371308, 782399, 1564798, 3129596, 5476793, 10953586, 21907172]

約数ペア:

[(1, 21907172), (2, 10953586), (4, 5476793), (7, 3129596), (14, 1564798), (28, 782399), (59, 371308), (89, 246148), (118, 185654), (149, 147028), (178, 123074), (236, 92827), (298, 73514), (356, 61537), (413, 53044), (596, 36757), (623, 35164), (826, 26522), (1043, 21004), (1246, 17582), (1652, 13261), (2086, 10502), (2492, 8791), (4172, 5251)]