81790640

素因数分解:

$2^4\times 5^1\times {\mathrm{1022383}}^1$

素因数の和:1022396

約数の個数: 20

約数和(自身を含む): 190163424

約数和(自身を除く): 108372784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1022383, 2044766, 4089532, 5111915, 8179064, 10223830, 16358128, 20447660, 40895320, 81790640]

約数ペア:

[(1, 81790640), (2, 40895320), (4, 20447660), (5, 16358128), (8, 10223830), (10, 8179064), (16, 5111915), (20, 4089532), (40, 2044766), (80, 1022383)]