9990920

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2473}}^1$

素因数の和:2585

約数の個数: 32

約数和(自身を含む): 22711320

約数和(自身を除く): 12720400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 2473, 4040, 4946, 9892, 12365, 19784, 24730, 49460, 98920, 249773, 499546, 999092, 1248865, 1998184, 2497730, 4995460, 9990920]

約数ペア:

[(1, 9990920), (2, 4995460), (4, 2497730), (5, 1998184), (8, 1248865), (10, 999092), (20, 499546), (40, 249773), (101, 98920), (202, 49460), (404, 24730), (505, 19784), (808, 12365), (1010, 9892), (2020, 4946), (2473, 4040)]