18220880

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{541}}^1$

素因数の和:975

約数の個数: 40

約数和(自身を含む): 42542664

約数和(自身を除く): 24321784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 541, 842, 1082, 1684, 2105, 2164, 2705, 3368, 4210, 4328, 5410, 6736, 8420, 8656, 10820, 16840, 21640, 33680, 43280, 227761, 455522, 911044, 1138805, 1822088, 2277610, 3644176, 4555220, 9110440, 18220880]

約数ペア:

[(1, 18220880), (2, 9110440), (4, 4555220), (5, 3644176), (8, 2277610), (10, 1822088), (16, 1138805), (20, 911044), (40, 455522), (80, 227761), (421, 43280), (541, 33680), (842, 21640), (1082, 16840), (1684, 10820), (2105, 8656), (2164, 8420), (2705, 6736), (3368, 5410), (4210, 4328)]