18217840

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{9901}}^1$

素因数の和:9937

約数の個数: 40

約数和(自身を含む): 44202528

約数和(自身を除く): 25984688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 9901, 19802, 39604, 49505, 79208, 99010, 158416, 198020, 227723, 396040, 455446, 792080, 910892, 1138615, 1821784, 2277230, 3643568, 4554460, 9108920, 18217840]

約数ペア:

[(1, 18217840), (2, 9108920), (4, 4554460), (5, 3643568), (8, 2277230), (10, 1821784), (16, 1138615), (20, 910892), (23, 792080), (40, 455446), (46, 396040), (80, 227723), (92, 198020), (115, 158416), (184, 99010), (230, 79208), (368, 49505), (460, 39604), (920, 19802), (1840, 9901)]