31991025

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2281}}^1$

素因数の和:2322

約数の個数: 48

約数和(自身を含む): 61121088

約数和(自身を除く): 29130063

約数列:

[1, 3, 5, 11, 15, 17, 25, 33, 51, 55, 75, 85, 165, 187, 255, 275, 425, 561, 825, 935, 1275, 2281, 2805, 4675, 6843, 11405, 14025, 25091, 34215, 38777, 57025, 75273, 116331, 125455, 171075, 193885, 376365, 426547, 581655, 627275, 969425, 1279641, 1881825, 2132735, 2908275, 6398205, 10663675, 31991025]

約数ペア:

[(1, 31991025), (3, 10663675), (5, 6398205), (11, 2908275), (15, 2132735), (17, 1881825), (25, 1279641), (33, 969425), (51, 627275), (55, 581655), (75, 426547), (85, 376365), (165, 193885), (187, 171075), (255, 125455), (275, 116331), (425, 75273), (561, 57025), (825, 38777), (935, 34215), (1275, 25091), (2281, 14025), (2805, 11405), (4675, 6843)]