20017040

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4721}}^1$

素因数の和:4787

約数の個数: 40

約数和(自身を含む): 47427768

約数和(自身を除く): 27410728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4721, 9442, 18884, 23605, 37768, 47210, 75536, 94420, 188840, 250213, 377680, 500426, 1000852, 1251065, 2001704, 2502130, 4003408, 5004260, 10008520, 20017040]

約数ペア:

[(1, 20017040), (2, 10008520), (4, 5004260), (5, 4003408), (8, 2502130), (10, 2001704), (16, 1251065), (20, 1000852), (40, 500426), (53, 377680), (80, 250213), (106, 188840), (212, 94420), (265, 75536), (424, 47210), (530, 37768), (848, 23605), (1060, 18884), (2120, 9442), (4240, 4721)]