21120705

素因数分解:

$3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{2713}}^1$

素因数の和:2897

約数の個数: 24

約数和(自身を含む): 36834408

約数和(自身を除く): 15713703

約数列:

[1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595, 2713, 7785, 8139, 13565, 24417, 40695, 122085, 469349, 1408047, 2346745, 4224141, 7040235, 21120705]

約数ペア:

[(1, 21120705), (3, 7040235), (5, 4224141), (9, 2346745), (15, 1408047), (45, 469349), (173, 122085), (519, 40695), (865, 24417), (1557, 13565), (2595, 8139), (2713, 7785)]