20778760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30557}}^1$

素因数の和:30585

約数の個数: 32

約数和(自身を含む): 49503960

約数和(自身を除く): 28725200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30557, 61114, 122228, 152785, 244456, 305570, 519469, 611140, 1038938, 1222280, 2077876, 2597345, 4155752, 5194690, 10389380, 20778760]

約数ペア:

[(1, 20778760), (2, 10389380), (4, 5194690), (5, 4155752), (8, 2597345), (10, 2077876), (17, 1222280), (20, 1038938), (34, 611140), (40, 519469), (68, 305570), (85, 244456), (136, 152785), (170, 122228), (340, 61114), (680, 30557)]