9996980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{101}}^2$

素因数の和:225

約数の個数: 54

約数和(自身を含む): 24665382

約数和(自身を除く): 14668402

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 101, 140, 196, 202, 245, 404, 490, 505, 707, 980, 1010, 1414, 2020, 2828, 3535, 4949, 7070, 9898, 10201, 14140, 19796, 20402, 24745, 40804, 49490, 51005, 71407, 98980, 102010, 142814, 204020, 285628, 357035, 499849, 714070, 999698, 1428140, 1999396, 2499245, 4998490, 9996980]

約数ペア:

[(1, 9996980), (2, 4998490), (4, 2499245), (5, 1999396), (7, 1428140), (10, 999698), (14, 714070), (20, 499849), (28, 357035), (35, 285628), (49, 204020), (70, 142814), (98, 102010), (101, 98980), (140, 71407), (196, 51005), (202, 49490), (245, 40804), (404, 24745), (490, 20402), (505, 19796), (707, 14140), (980, 10201), (1010, 9898), (1414, 7070), (2020, 4949), (2828, 3535)]