20552120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8423}}^1$

素因数の和:8495

約数の個数: 32

約数和(自身を含む): 47005920

約数和(自身を除く): 26453800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8423, 16846, 33692, 42115, 67384, 84230, 168460, 336920, 513803, 1027606, 2055212, 2569015, 4110424, 5138030, 10276060, 20552120]

約数ペア:

[(1, 20552120), (2, 10276060), (4, 5138030), (5, 4110424), (8, 2569015), (10, 2055212), (20, 1027606), (40, 513803), (61, 336920), (122, 168460), (244, 84230), (305, 67384), (488, 42115), (610, 33692), (1220, 16846), (2440, 8423)]