20318805

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{739}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 18469035

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 47, 65, 117, 141, 195, 235, 423, 585, 611, 705, 739, 1833, 2115, 2217, 3055, 3695, 5499, 6651, 9165, 9607, 11085, 27495, 28821, 33255, 34733, 48035, 86463, 104199, 144105, 173665, 312597, 432315, 451529, 520995, 1354587, 1562985, 2257645, 4063761, 6772935, 20318805]

約数ペア:

[(1, 20318805), (3, 6772935), (5, 4063761), (9, 2257645), (13, 1562985), (15, 1354587), (39, 520995), (45, 451529), (47, 432315), (65, 312597), (117, 173665), (141, 144105), (195, 104199), (235, 86463), (423, 48035), (585, 34733), (611, 33255), (705, 28821), (739, 27495), (1833, 11085), (2115, 9607), (2217, 9165), (3055, 6651), (3695, 5499)]