20520220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20939}}^1$

素因数の和:20962

約数の個数: 36

約数和(自身を含む): 50130360

約数和(自身を除く): 29610140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20939, 41878, 83756, 104695, 146573, 209390, 293146, 418780, 586292, 732865, 1026011, 1465730, 2052022, 2931460, 4104044, 5130055, 10260110, 20520220]

約数ペア:

[(1, 20520220), (2, 10260110), (4, 5130055), (5, 4104044), (7, 2931460), (10, 2052022), (14, 1465730), (20, 1026011), (28, 732865), (35, 586292), (49, 418780), (70, 293146), (98, 209390), (140, 146573), (196, 104695), (245, 83756), (490, 41878), (980, 20939)]