21457575

素因数分解:

$3^3\times 5^2\times {\mathrm{83}}^1\times {\mathrm{383}}^1$

素因数の和:485

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 18539865

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 83, 135, 225, 249, 383, 415, 675, 747, 1149, 1245, 1915, 2075, 2241, 3447, 3735, 5745, 6225, 9575, 10341, 11205, 17235, 18675, 28725, 31789, 51705, 56025, 86175, 95367, 158945, 258525, 286101, 476835, 794725, 858303, 1430505, 2384175, 4291515, 7152525, 21457575]

約数ペア:

[(1, 21457575), (3, 7152525), (5, 4291515), (9, 2384175), (15, 1430505), (25, 858303), (27, 794725), (45, 476835), (75, 286101), (83, 258525), (135, 158945), (225, 95367), (249, 86175), (383, 56025), (415, 51705), (675, 31789), (747, 28725), (1149, 18675), (1245, 17235), (1915, 11205), (2075, 10341), (2241, 9575), (3447, 6225), (3735, 5745)]