20516420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{33091}}^1$

素因数の和:33131

約数の個数: 24

約数和(自身を含む): 44475648

約数和(自身を除く): 23959228

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 33091, 66182, 132364, 165455, 330910, 661820, 1025821, 2051642, 4103284, 5129105, 10258210, 20516420]

約数ペア:

[(1, 20516420), (2, 10258210), (4, 5129105), (5, 4103284), (10, 2051642), (20, 1025821), (31, 661820), (62, 330910), (124, 165455), (155, 132364), (310, 66182), (620, 33091)]