21211615

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{241}}^1\times {\mathrm{607}}^1$

素因数の和:882

約数の個数: 16

約数和(自身を含む): 26484480

約数和(自身を除く): 5272865

約数列:

[1, 5, 29, 145, 241, 607, 1205, 3035, 6989, 17603, 34945, 88015, 146287, 731435, 4242323, 21211615]

約数ペア:

[(1, 21211615), (5, 4242323), (29, 731435), (145, 146287), (241, 88015), (607, 34945), (1205, 17603), (3035, 6989)]