90202660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{457}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 193898880

約数和(自身を除く): 103696220

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 278, 284, 355, 457, 556, 695, 710, 914, 1390, 1420, 1828, 2285, 2780, 4570, 9140, 9869, 19738, 32447, 39476, 49345, 63523, 64894, 98690, 127046, 129788, 162235, 197380, 254092, 317615, 324470, 635230, 648940, 1270460, 4510133, 9020266, 18040532, 22550665, 45101330, 90202660]

約数ペア:

[(1, 90202660), (2, 45101330), (4, 22550665), (5, 18040532), (10, 9020266), (20, 4510133), (71, 1270460), (139, 648940), (142, 635230), (278, 324470), (284, 317615), (355, 254092), (457, 197380), (556, 162235), (695, 129788), (710, 127046), (914, 98690), (1390, 64894), (1420, 63523), (1828, 49345), (2285, 39476), (2780, 32447), (4570, 19738), (9140, 9869)]