20051980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{331}}^1$

素因数の和:586

約数の個数: 48

約数和(自身を含む): 45680544

約数和(自身を除く): 25628564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 233, 260, 331, 466, 662, 932, 1165, 1324, 1655, 2330, 3029, 3310, 4303, 4660, 6058, 6620, 8606, 12116, 15145, 17212, 21515, 30290, 43030, 60580, 77123, 86060, 154246, 308492, 385615, 771230, 1002599, 1542460, 2005198, 4010396, 5012995, 10025990, 20051980]

約数ペア:

[(1, 20051980), (2, 10025990), (4, 5012995), (5, 4010396), (10, 2005198), (13, 1542460), (20, 1002599), (26, 771230), (52, 385615), (65, 308492), (130, 154246), (233, 86060), (260, 77123), (331, 60580), (466, 43030), (662, 30290), (932, 21515), (1165, 17212), (1324, 15145), (1655, 12116), (2330, 8606), (3029, 6620), (3310, 6058), (4303, 4660)]