28720920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3371}}^1$

素因数の和:3456

約数の個数: 64

約数和(自身を含む): 87402240

約数和(自身を除く): 58681320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 71, 120, 142, 213, 284, 355, 426, 568, 710, 852, 1065, 1420, 1704, 2130, 2840, 3371, 4260, 6742, 8520, 10113, 13484, 16855, 20226, 26968, 33710, 40452, 50565, 67420, 80904, 101130, 134840, 202260, 239341, 404520, 478682, 718023, 957364, 1196705, 1436046, 1914728, 2393410, 2872092, 3590115, 4786820, 5744184, 7180230, 9573640, 14360460, 28720920]

約数ペア:

[(1, 28720920), (2, 14360460), (3, 9573640), (4, 7180230), (5, 5744184), (6, 4786820), (8, 3590115), (10, 2872092), (12, 2393410), (15, 1914728), (20, 1436046), (24, 1196705), (30, 957364), (40, 718023), (60, 478682), (71, 404520), (120, 239341), (142, 202260), (213, 134840), (284, 101130), (355, 80904), (426, 67420), (568, 50565), (710, 40452), (852, 33710), (1065, 26968), (1420, 20226), (1704, 16855), (2130, 13484), (2840, 10113), (3371, 8520), (4260, 6742)]