21663681

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{5393}}^1$

素因数の和:5512

約数の個数: 16

約数和(自身を含む): 31414656

約数和(自身を除く): 9750975

約数列:

[1, 3, 13, 39, 103, 309, 1339, 4017, 5393, 16179, 70109, 210327, 555479, 1666437, 7221227, 21663681]

約数ペア:

[(1, 21663681), (3, 7221227), (13, 1666437), (39, 555479), (103, 210327), (309, 70109), (1339, 16179), (4017, 5393)]