89710220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{499}}^1$

素因数の和:698

約数の個数: 48

約数和(自身を含む): 192780000

約数和(自身を除く): 103069780

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 178, 202, 356, 404, 445, 499, 505, 890, 998, 1010, 1780, 1996, 2020, 2495, 4990, 8989, 9980, 17978, 35956, 44411, 44945, 50399, 88822, 89890, 100798, 177644, 179780, 201596, 222055, 251995, 444110, 503990, 888220, 1007980, 4485511, 8971022, 17942044, 22427555, 44855110, 89710220]

約数ペア:

[(1, 89710220), (2, 44855110), (4, 22427555), (5, 17942044), (10, 8971022), (20, 4485511), (89, 1007980), (101, 888220), (178, 503990), (202, 444110), (356, 251995), (404, 222055), (445, 201596), (499, 179780), (505, 177644), (890, 100798), (998, 89890), (1010, 88822), (1780, 50399), (1996, 44945), (2020, 44411), (2495, 35956), (4990, 17978), (8989, 9980)]