81365080

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65617}}^1$

素因数の和:65659

約数の個数: 32

約数和(自身を含む): 188979840

約数和(自身を除く): 107614760

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65617, 131234, 262468, 328085, 524936, 656170, 1312340, 2034127, 2624680, 4068254, 8136508, 10170635, 16273016, 20341270, 40682540, 81365080]

約数ペア:

[(1, 81365080), (2, 40682540), (4, 20341270), (5, 16273016), (8, 10170635), (10, 8136508), (20, 4068254), (31, 2624680), (40, 2034127), (62, 1312340), (124, 656170), (155, 524936), (248, 328085), (310, 262468), (620, 131234), (1240, 65617)]