21838725

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^2\times {\mathrm{101}}^1$

素因数の和:179

約数の個数: 54

約数和(自身を含む): 40818258

約数和(自身を除く): 18979533

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 101, 155, 225, 279, 303, 465, 505, 775, 909, 961, 1395, 1515, 2325, 2525, 2883, 3131, 4545, 4805, 6975, 7575, 8649, 9393, 14415, 15655, 22725, 24025, 28179, 43245, 46965, 72075, 78275, 97061, 140895, 216225, 234825, 291183, 485305, 704475, 873549, 1455915, 2426525, 4367745, 7279575, 21838725]

約数ペア:

[(1, 21838725), (3, 7279575), (5, 4367745), (9, 2426525), (15, 1455915), (25, 873549), (31, 704475), (45, 485305), (75, 291183), (93, 234825), (101, 216225), (155, 140895), (225, 97061), (279, 78275), (303, 72075), (465, 46965), (505, 43245), (775, 28179), (909, 24025), (961, 22725), (1395, 15655), (1515, 14415), (2325, 9393), (2525, 8649), (2883, 7575), (3131, 6975), (4545, 4805)]