81539320

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20183}}^1$

素因数の和:20295

約数の個数: 32

約数和(自身を含む): 185289120

約数和(自身を除く): 103749800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 20183, 40366, 80732, 100915, 161464, 201830, 403660, 807320, 2038483, 4076966, 8153932, 10192415, 16307864, 20384830, 40769660, 81539320]

約数ペア:

[(1, 81539320), (2, 40769660), (4, 20384830), (5, 16307864), (8, 10192415), (10, 8153932), (20, 4076966), (40, 2038483), (101, 807320), (202, 403660), (404, 201830), (505, 161464), (808, 100915), (1010, 80732), (2020, 40366), (4040, 20183)]