20785040

素因数分解:

$2^4\times 5^1\times {\mathrm{259813}}^1$

素因数の和:259826

約数の個数: 20

約数和(自身を含む): 48325404

約数和(自身を除く): 27540364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259813, 519626, 1039252, 1299065, 2078504, 2598130, 4157008, 5196260, 10392520, 20785040]

約数ペア:

[(1, 20785040), (2, 10392520), (4, 5196260), (5, 4157008), (8, 2598130), (10, 2078504), (16, 1299065), (20, 1039252), (40, 519626), (80, 259813)]