81489080

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65717}}^1$

素因数の和:65759

約数の個数: 32

約数和(自身を含む): 189267840

約数和(自身を除く): 107778760

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65717, 131434, 262868, 328585, 525736, 657170, 1314340, 2037227, 2628680, 4074454, 8148908, 10186135, 16297816, 20372270, 40744540, 81489080]

約数ペア:

[(1, 81489080), (2, 40744540), (4, 20372270), (5, 16297816), (8, 10186135), (10, 8148908), (20, 4074454), (31, 2628680), (40, 2037227), (62, 1314340), (124, 657170), (155, 525736), (248, 328585), (310, 262868), (620, 131434), (1240, 65717)]