21143915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{1433}}^1$

素因数の和:1678

約数の個数: 16

約数和(自身を含む): 27463968

約数和(自身を除く): 6320053

約数列:

[1, 5, 13, 65, 227, 1135, 1433, 2951, 7165, 14755, 18629, 93145, 325291, 1626455, 4228783, 21143915]

約数ペア:

[(1, 21143915), (5, 4228783), (13, 1626455), (65, 325291), (227, 93145), (1135, 18629), (1433, 14755), (2951, 7165)]