20168775

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:337

約数の個数: 72

約数和(自身を含む): 40912560

約数和(自身を除く): 20743785

約数列:

[1, 3, 5, 9, 11, 15, 25, 29, 33, 45, 55, 75, 87, 99, 145, 165, 225, 261, 275, 281, 319, 435, 495, 725, 825, 843, 957, 1305, 1405, 1595, 2175, 2475, 2529, 2871, 3091, 4215, 4785, 6525, 7025, 7975, 8149, 9273, 12645, 14355, 15455, 21075, 23925, 24447, 27819, 40745, 46365, 63225, 71775, 73341, 77275, 89639, 122235, 139095, 203725, 231825, 268917, 366705, 448195, 611175, 695475, 806751, 1344585, 1833525, 2240975, 4033755, 6722925, 20168775]

約数ペア:

[(1, 20168775), (3, 6722925), (5, 4033755), (9, 2240975), (11, 1833525), (15, 1344585), (25, 806751), (29, 695475), (33, 611175), (45, 448195), (55, 366705), (75, 268917), (87, 231825), (99, 203725), (145, 139095), (165, 122235), (225, 89639), (261, 77275), (275, 73341), (281, 71775), (319, 63225), (435, 46365), (495, 40745), (725, 27819), (825, 24447), (843, 23925), (957, 21075), (1305, 15455), (1405, 14355), (1595, 12645), (2175, 9273), (2475, 8149), (2529, 7975), (2871, 7025), (3091, 6525), (4215, 4785)]