21031147875

素因数分解:

$3^1\times 5^3\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{11981}}^1$

素因数の和:12181

約数の個数: 64

約数和(自身を含む): 36366999552

約数和(自身を除く): 15335851677

約数列:

[1, 3, 5, 15, 25, 31, 75, 93, 125, 151, 155, 375, 453, 465, 755, 775, 2265, 2325, 3775, 3875, 4681, 11325, 11625, 11981, 14043, 18875, 23405, 35943, 56625, 59905, 70215, 117025, 179715, 299525, 351075, 371411, 585125, 898575, 1114233, 1497625, 1755375, 1809131, 1857055, 4492875, 5427393, 5571165, 9045655, 9285275, 27136965, 27855825, 45228275, 46426375, 56083061, 135684825, 139279125, 168249183, 226141375, 280415305, 678424125, 841245915, 1402076525, 4206229575, 7010382625, 21031147875]

約数ペア:

[(1, 21031147875), (3, 7010382625), (5, 4206229575), (15, 1402076525), (25, 841245915), (31, 678424125), (75, 280415305), (93, 226141375), (125, 168249183), (151, 139279125), (155, 135684825), (375, 56083061), (453, 46426375), (465, 45228275), (755, 27855825), (775, 27136965), (2265, 9285275), (2325, 9045655), (3775, 5571165), (3875, 5427393), (4681, 4492875), (11325, 1857055), (11625, 1809131), (11981, 1755375), (14043, 1497625), (18875, 1114233), (23405, 898575), (35943, 585125), (56625, 371411), (59905, 351075), (70215, 299525), (117025, 179715)]