81204160

素因数分解:

$2^6\times 5^1\times {\mathrm{253763}}^1$

素因数の和:253780

約数の個数: 28

約数和(自身を含む): 193368168

約数和(自身を除く): 112164008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 253763, 507526, 1015052, 1268815, 2030104, 2537630, 4060208, 5075260, 8120416, 10150520, 16240832, 20301040, 40602080, 81204160]

約数ペア:

[(1, 81204160), (2, 40602080), (4, 20301040), (5, 16240832), (8, 10150520), (10, 8120416), (16, 5075260), (20, 4060208), (32, 2537630), (40, 2030104), (64, 1268815), (80, 1015052), (160, 507526), (320, 253763)]