21787065

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7937}}^1$

素因数の和:8009

約数の個数: 24

約数和(自身を含む): 38388168

約数和(自身を除く): 16601103

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7937, 23811, 39685, 71433, 119055, 357165, 484157, 1452471, 2420785, 4357413, 7262355, 21787065]

約数ペア:

[(1, 21787065), (3, 7262355), (5, 4357413), (9, 2420785), (15, 1452471), (45, 484157), (61, 357165), (183, 119055), (305, 71433), (549, 39685), (915, 23811), (2745, 7937)]