644380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:150

約数の個数: 48

約数和(自身を含む): 1542240

約数和(自身を除く): 897860

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 101, 110, 116, 145, 202, 220, 290, 319, 404, 505, 580, 638, 1010, 1111, 1276, 1595, 2020, 2222, 2929, 3190, 4444, 5555, 5858, 6380, 11110, 11716, 14645, 22220, 29290, 32219, 58580, 64438, 128876, 161095, 322190, 644380]

約数ペア:

[(1, 644380), (2, 322190), (4, 161095), (5, 128876), (10, 64438), (11, 58580), (20, 32219), (22, 29290), (29, 22220), (44, 14645), (55, 11716), (58, 11110), (101, 6380), (110, 5858), (116, 5555), (145, 4444), (202, 3190), (220, 2929), (290, 2222), (319, 2020), (404, 1595), (505, 1276), (580, 1111), (638, 1010)]