18228880

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{9907}}^1$

素因数の和:9943

約数の個数: 40

約数和(自身を含む): 44229312

約数和(自身を除く): 26000432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 9907, 19814, 39628, 49535, 79256, 99070, 158512, 198140, 227861, 396280, 455722, 792560, 911444, 1139305, 1822888, 2278610, 3645776, 4557220, 9114440, 18228880]

約数ペア:

[(1, 18228880), (2, 9114440), (4, 4557220), (5, 3645776), (8, 2278610), (10, 1822888), (16, 1139305), (20, 911444), (23, 792560), (40, 455722), (46, 396280), (80, 227861), (92, 198140), (115, 158512), (184, 99070), (230, 79256), (368, 49535), (460, 39628), (920, 19814), (1840, 9907)]