81807760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32987}}^1$

素因数の和:33031

約数の個数: 40

約数和(自身を含む): 196344576

約数和(自身を除く): 114536816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 32987, 65974, 131948, 164935, 263896, 329870, 527792, 659740, 1022597, 1319480, 2045194, 2638960, 4090388, 5112985, 8180776, 10225970, 16361552, 20451940, 40903880, 81807760]

約数ペア:

[(1, 81807760), (2, 40903880), (4, 20451940), (5, 16361552), (8, 10225970), (10, 8180776), (16, 5112985), (20, 4090388), (31, 2638960), (40, 2045194), (62, 1319480), (80, 1022597), (124, 659740), (155, 527792), (248, 329870), (310, 263896), (496, 164935), (620, 131948), (1240, 65974), (2480, 32987)]