21815840

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{2311}}^1$

素因数の和:2385

約数の個数: 48

約数和(自身を含む): 52436160

約数和(自身を除く): 30620320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 80, 118, 160, 236, 295, 472, 590, 944, 1180, 1888, 2311, 2360, 4622, 4720, 9244, 9440, 11555, 18488, 23110, 36976, 46220, 73952, 92440, 136349, 184880, 272698, 369760, 545396, 681745, 1090792, 1363490, 2181584, 2726980, 4363168, 5453960, 10907920, 21815840]

約数ペア:

[(1, 21815840), (2, 10907920), (4, 5453960), (5, 4363168), (8, 2726980), (10, 2181584), (16, 1363490), (20, 1090792), (32, 681745), (40, 545396), (59, 369760), (80, 272698), (118, 184880), (160, 136349), (236, 92440), (295, 73952), (472, 46220), (590, 36976), (944, 23110), (1180, 18488), (1888, 11555), (2311, 9440), (2360, 9244), (4622, 4720)]