21989115

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4483}}^1$

素因数の和:4603

約数の個数: 24

約数和(自身を含む): 38472720

約数和(自身を除く): 16483605

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4483, 4905, 13449, 22415, 40347, 67245, 201735, 488647, 1465941, 2443235, 4397823, 7329705, 21989115]

約数ペア:

[(1, 21989115), (3, 7329705), (5, 4397823), (9, 2443235), (15, 1465941), (45, 488647), (109, 201735), (327, 67245), (545, 40347), (981, 22415), (1635, 13449), (4483, 4905)]