20191940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{443}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 44307648

約数和(自身を除く): 24115708

約数列:

[1, 2, 4, 5, 10, 20, 43, 53, 86, 106, 172, 212, 215, 265, 430, 443, 530, 860, 886, 1060, 1772, 2215, 2279, 4430, 4558, 8860, 9116, 11395, 19049, 22790, 23479, 38098, 45580, 46958, 76196, 93916, 95245, 117395, 190490, 234790, 380980, 469580, 1009597, 2019194, 4038388, 5047985, 10095970, 20191940]

約数ペア:

[(1, 20191940), (2, 10095970), (4, 5047985), (5, 4038388), (10, 2019194), (20, 1009597), (43, 469580), (53, 380980), (86, 234790), (106, 190490), (172, 117395), (212, 95245), (215, 93916), (265, 76196), (430, 46958), (443, 45580), (530, 38098), (860, 23479), (886, 22790), (1060, 19049), (1772, 11395), (2215, 9116), (2279, 8860), (4430, 4558)]