21201560

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1259}}^1$

素因数の和:1691

約数の個数: 32

約数和(自身を含む): 47854800

約数和(自身を除く): 26653240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1259, 1684, 2105, 2518, 3368, 4210, 5036, 6295, 8420, 10072, 12590, 16840, 25180, 50360, 530039, 1060078, 2120156, 2650195, 4240312, 5300390, 10600780, 21201560]

約数ペア:

[(1, 21201560), (2, 10600780), (4, 5300390), (5, 4240312), (8, 2650195), (10, 2120156), (20, 1060078), (40, 530039), (421, 50360), (842, 25180), (1259, 16840), (1684, 12590), (2105, 10072), (2518, 8420), (3368, 6295), (4210, 5036)]