21905055

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10357}}^1$

素因数の和:10415

約数の個数: 24

約数和(自身を含む): 38780352

約数和(自身を除く): 16875297

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 10357, 31071, 51785, 93213, 155355, 466065, 486779, 1460337, 2433895, 4381011, 7301685, 21905055]

約数ペア:

[(1, 21905055), (3, 7301685), (5, 4381011), (9, 2433895), (15, 1460337), (45, 486779), (47, 466065), (141, 155355), (235, 93213), (423, 51785), (705, 31071), (2115, 10357)]