81124520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65423}}^1$

素因数の和:65465

約数の個数: 32

約数和(自身を含む): 188421120

約数和(自身を除く): 107296600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65423, 130846, 261692, 327115, 523384, 654230, 1308460, 2028113, 2616920, 4056226, 8112452, 10140565, 16224904, 20281130, 40562260, 81124520]

約数ペア:

[(1, 81124520), (2, 40562260), (4, 20281130), (5, 16224904), (8, 10140565), (10, 8112452), (20, 4056226), (31, 2616920), (40, 2028113), (62, 1308460), (124, 654230), (155, 523384), (248, 327115), (310, 261692), (620, 130846), (1240, 65423)]