21688605

素因数分解:

$3^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1381}}^1$

素因数の和:1741

約数の個数: 24

約数和(自身を含む): 37728600

約数和(自身を除く): 16039995

約数列:

[1, 3, 5, 9, 15, 45, 349, 1047, 1381, 1745, 3141, 4143, 5235, 6905, 12429, 15705, 20715, 62145, 481969, 1445907, 2409845, 4337721, 7229535, 21688605]

約数ペア:

[(1, 21688605), (3, 7229535), (5, 4337721), (9, 2409845), (15, 1445907), (45, 481969), (349, 62145), (1047, 20715), (1381, 15705), (1745, 12429), (3141, 6905), (4143, 5235)]