21648515

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{229}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 31044480

約数和(自身を除く): 9395965

約数列:

[1, 5, 7, 35, 37, 73, 185, 229, 259, 365, 511, 1145, 1295, 1603, 2555, 2701, 8015, 8473, 13505, 16717, 18907, 42365, 59311, 83585, 94535, 117019, 296555, 585095, 618529, 3092645, 4329703, 21648515]

約数ペア:

[(1, 21648515), (5, 4329703), (7, 3092645), (35, 618529), (37, 585095), (73, 296555), (185, 117019), (229, 94535), (259, 83585), (365, 59311), (511, 42365), (1145, 18907), (1295, 16717), (1603, 13505), (2555, 8473), (2701, 8015)]