87720520

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{21713}}^1$

素因数の和:21825

約数の個数: 32

約数和(自身を含む): 199334520

約数和(自身を除く): 111614000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 21713, 43426, 86852, 108565, 173704, 217130, 434260, 868520, 2193013, 4386026, 8772052, 10965065, 17544104, 21930130, 43860260, 87720520]

約数ペア:

[(1, 87720520), (2, 43860260), (4, 21930130), (5, 17544104), (8, 10965065), (10, 8772052), (20, 4386026), (40, 2193013), (101, 868520), (202, 434260), (404, 217130), (505, 173704), (808, 108565), (1010, 86852), (2020, 43426), (4040, 21713)]