21753940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2699}}^1$

素因数の和:2752

約数の個数: 48

約数和(自身を含む): 50803200

約数和(自身を除く): 29049260

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 260, 310, 403, 620, 806, 1612, 2015, 2699, 4030, 5398, 8060, 10796, 13495, 26990, 35087, 53980, 70174, 83669, 140348, 167338, 175435, 334676, 350870, 418345, 701740, 836690, 1087697, 1673380, 2175394, 4350788, 5438485, 10876970, 21753940]

約数ペア:

[(1, 21753940), (2, 10876970), (4, 5438485), (5, 4350788), (10, 2175394), (13, 1673380), (20, 1087697), (26, 836690), (31, 701740), (52, 418345), (62, 350870), (65, 334676), (124, 175435), (130, 167338), (155, 140348), (260, 83669), (310, 70174), (403, 53980), (620, 35087), (806, 26990), (1612, 13495), (2015, 10796), (2699, 8060), (4030, 5398)]