21578445

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1123}}^1$

素因数の和:1202

約数の個数: 48

約数和(自身を含む): 43485312

約数和(自身を除く): 21906867

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 61, 63, 105, 183, 305, 315, 427, 549, 915, 1123, 1281, 2135, 2745, 3369, 3843, 5615, 6405, 7861, 10107, 16845, 19215, 23583, 39305, 50535, 68503, 70749, 117915, 205509, 342515, 353745, 479521, 616527, 1027545, 1438563, 2397605, 3082635, 4315689, 7192815, 21578445]

約数ペア:

[(1, 21578445), (3, 7192815), (5, 4315689), (7, 3082635), (9, 2397605), (15, 1438563), (21, 1027545), (35, 616527), (45, 479521), (61, 353745), (63, 342515), (105, 205509), (183, 117915), (305, 70749), (315, 68503), (427, 50535), (549, 39305), (915, 23583), (1123, 19215), (1281, 16845), (2135, 10107), (2745, 7861), (3369, 6405), (3843, 5615)]