21588880

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{641}}^1$

素因数の和:1075

約数の個数: 40

約数和(自身を含む): 50391864

約数和(自身を除く): 28802984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 641, 842, 1282, 1684, 2105, 2564, 3205, 3368, 4210, 5128, 6410, 6736, 8420, 10256, 12820, 16840, 25640, 33680, 51280, 269861, 539722, 1079444, 1349305, 2158888, 2698610, 4317776, 5397220, 10794440, 21588880]

約数ペア:

[(1, 21588880), (2, 10794440), (4, 5397220), (5, 4317776), (8, 2698610), (10, 2158888), (16, 1349305), (20, 1079444), (40, 539722), (80, 269861), (421, 51280), (641, 33680), (842, 25640), (1282, 16840), (1684, 12820), (2105, 10256), (2564, 8420), (3205, 6736), (3368, 6410), (4210, 5128)]