20408025

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{853}}^1$

素因数の和:906

約数の個数: 48

約数和(自身を含む): 38122560

約数和(自身を除く): 17714535

約数列:

[1, 3, 5, 11, 15, 25, 29, 33, 55, 75, 87, 145, 165, 275, 319, 435, 725, 825, 853, 957, 1595, 2175, 2559, 4265, 4785, 7975, 9383, 12795, 21325, 23925, 24737, 28149, 46915, 63975, 74211, 123685, 140745, 234575, 272107, 371055, 618425, 703725, 816321, 1360535, 1855275, 4081605, 6802675, 20408025]

約数ペア:

[(1, 20408025), (3, 6802675), (5, 4081605), (11, 1855275), (15, 1360535), (25, 816321), (29, 703725), (33, 618425), (55, 371055), (75, 272107), (87, 234575), (145, 140745), (165, 123685), (275, 74211), (319, 63975), (435, 46915), (725, 28149), (825, 24737), (853, 23925), (957, 21325), (1595, 12795), (2175, 9383), (2559, 7975), (4265, 4785)]