20405940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1879}}^1$

素因数の和:2072

約数の個数: 48

約数和(自身を含む): 57482880

約数和(自身を除く): 37076940

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 181, 362, 543, 724, 905, 1086, 1810, 1879, 2172, 2715, 3620, 3758, 5430, 5637, 7516, 9395, 10860, 11274, 18790, 22548, 28185, 37580, 56370, 112740, 340099, 680198, 1020297, 1360396, 1700495, 2040594, 3400990, 4081188, 5101485, 6801980, 10202970, 20405940]

約数ペア:

[(1, 20405940), (2, 10202970), (3, 6801980), (4, 5101485), (5, 4081188), (6, 3400990), (10, 2040594), (12, 1700495), (15, 1360396), (20, 1020297), (30, 680198), (60, 340099), (181, 112740), (362, 56370), (543, 37580), (724, 28185), (905, 22548), (1086, 18790), (1810, 11274), (1879, 10860), (2172, 9395), (2715, 7516), (3620, 5637), (3758, 5430)]