81283240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65551}}^1$

素因数の和:65593

約数の個数: 32

約数和(自身を含む): 188789760

約数和(自身を除く): 107506520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65551, 131102, 262204, 327755, 524408, 655510, 1311020, 2032081, 2622040, 4064162, 8128324, 10160405, 16256648, 20320810, 40641620, 81283240]

約数ペア:

[(1, 81283240), (2, 40641620), (4, 20320810), (5, 16256648), (8, 10160405), (10, 8128324), (20, 4064162), (31, 2622040), (40, 2032081), (62, 1311020), (124, 655510), (155, 524408), (248, 327755), (310, 262204), (620, 131102), (1240, 65551)]