21381563

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{353}}^1\times {\mathrm{509}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 25997760

約数和(自身を除く): 4616197

約数列:

[1, 7, 17, 119, 353, 509, 2471, 3563, 6001, 8653, 42007, 60571, 179677, 1257739, 3054509, 21381563]

約数ペア:

[(1, 21381563), (7, 3054509), (17, 1257739), (119, 179677), (353, 60571), (509, 42007), (2471, 8653), (3563, 6001)]