21151340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{191}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 52399872

約数和(自身を除く): 31248532

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 113, 140, 191, 196, 226, 245, 382, 452, 490, 565, 764, 791, 955, 980, 1130, 1337, 1582, 1910, 2260, 2674, 3164, 3820, 3955, 5348, 5537, 6685, 7910, 9359, 11074, 13370, 15820, 18718, 21583, 22148, 26740, 27685, 37436, 43166, 46795, 55370, 86332, 93590, 107915, 110740, 151081, 187180, 215830, 302162, 431660, 604324, 755405, 1057567, 1510810, 2115134, 3021620, 4230268, 5287835, 10575670, 21151340]

約数ペア:

[(1, 21151340), (2, 10575670), (4, 5287835), (5, 4230268), (7, 3021620), (10, 2115134), (14, 1510810), (20, 1057567), (28, 755405), (35, 604324), (49, 431660), (70, 302162), (98, 215830), (113, 187180), (140, 151081), (191, 110740), (196, 107915), (226, 93590), (245, 86332), (382, 55370), (452, 46795), (490, 43166), (565, 37436), (764, 27685), (791, 26740), (955, 22148), (980, 21583), (1130, 18718), (1337, 15820), (1582, 13370), (1910, 11074), (2260, 9359), (2674, 7910), (3164, 6685), (3820, 5537), (3955, 5348)]