81854440

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20261}}^1$

素因数の和:20373

約数の個数: 32

約数和(自身を含む): 186005160

約数和(自身を除く): 104150720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 20261, 40522, 81044, 101305, 162088, 202610, 405220, 810440, 2046361, 4092722, 8185444, 10231805, 16370888, 20463610, 40927220, 81854440]

約数ペア:

[(1, 81854440), (2, 40927220), (4, 20463610), (5, 16370888), (8, 10231805), (10, 8185444), (20, 4092722), (40, 2046361), (101, 810440), (202, 405220), (404, 202610), (505, 162088), (808, 101305), (1010, 81044), (2020, 40522), (4040, 20261)]