81212480

素因数分解:

$2^6\times 5^1\times {\mathrm{253789}}^1$

素因数の和:253806

約数の個数: 28

約数和(自身を含む): 193387980

約数和(自身を除く): 112175500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 253789, 507578, 1015156, 1268945, 2030312, 2537890, 4060624, 5075780, 8121248, 10151560, 16242496, 20303120, 40606240, 81212480]

約数ペア:

[(1, 81212480), (2, 40606240), (4, 20303120), (5, 16242496), (8, 10151560), (10, 8121248), (16, 5075780), (20, 4060624), (32, 2537890), (40, 2030312), (64, 1268945), (80, 1015156), (160, 507578), (320, 253789)]