21408255

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{709}}^1$

素因数の和:792

約数の個数: 48

約数和(自身を含む): 41202720

約数和(自身を除く): 19794465

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 61, 99, 165, 183, 305, 495, 549, 671, 709, 915, 2013, 2127, 2745, 3355, 3545, 6039, 6381, 7799, 10065, 10635, 23397, 30195, 31905, 38995, 43249, 70191, 116985, 129747, 216245, 350955, 389241, 475739, 648735, 1427217, 1946205, 2378695, 4281651, 7136085, 21408255]

約数ペア:

[(1, 21408255), (3, 7136085), (5, 4281651), (9, 2378695), (11, 1946205), (15, 1427217), (33, 648735), (45, 475739), (55, 389241), (61, 350955), (99, 216245), (165, 129747), (183, 116985), (305, 70191), (495, 43249), (549, 38995), (671, 31905), (709, 30195), (915, 23397), (2013, 10635), (2127, 10065), (2745, 7799), (3355, 6381), (3545, 6039)]