20990055

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{661}}^1$

素因数の和:771

約数の個数: 32

約数和(自身を含む): 35271360

約数和(自身を除く): 14281305

約数列:

[1, 3, 5, 15, 29, 73, 87, 145, 219, 365, 435, 661, 1095, 1983, 2117, 3305, 6351, 9915, 10585, 19169, 31755, 48253, 57507, 95845, 144759, 241265, 287535, 723795, 1399337, 4198011, 6996685, 20990055]

約数ペア:

[(1, 20990055), (3, 6996685), (5, 4198011), (15, 1399337), (29, 723795), (73, 287535), (87, 241265), (145, 144759), (219, 95845), (365, 57507), (435, 48253), (661, 31755), (1095, 19169), (1983, 10585), (2117, 9915), (3305, 6351)]