20493980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78823}}^1$

素因数の和:78845

約数の個数: 24

約数和(自身を含む): 46348512

約数和(自身を除く): 25854532

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78823, 157646, 315292, 394115, 788230, 1024699, 1576460, 2049398, 4098796, 5123495, 10246990, 20493980]

約数ペア:

[(1, 20493980), (2, 10246990), (4, 5123495), (5, 4098796), (10, 2049398), (13, 1576460), (20, 1024699), (26, 788230), (52, 394115), (65, 315292), (130, 157646), (260, 78823)]