21137985

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42703}}^1$

素因数の和:42725

約数の個数: 24

約数和(自身を含む): 39970944

約数和(自身を除く): 18832959

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42703, 128109, 213515, 384327, 469733, 640545, 1409199, 1921635, 2348665, 4227597, 7045995, 21137985]

約数ペア:

[(1, 21137985), (3, 7045995), (5, 4227597), (9, 2348665), (11, 1921635), (15, 1409199), (33, 640545), (45, 469733), (55, 384327), (99, 213515), (165, 128109), (495, 42703)]