18204040

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:502

約数の個数: 64

約数和(自身を含む): 43752960

約数和(自身を除く): 25548920

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 47, 92, 94, 115, 184, 188, 230, 235, 376, 421, 460, 470, 842, 920, 940, 1081, 1684, 1880, 2105, 2162, 3368, 4210, 4324, 5405, 8420, 8648, 9683, 10810, 16840, 19366, 19787, 21620, 38732, 39574, 43240, 48415, 77464, 79148, 96830, 98935, 158296, 193660, 197870, 387320, 395740, 455101, 791480, 910202, 1820404, 2275505, 3640808, 4551010, 9102020, 18204040]

約数ペア:

[(1, 18204040), (2, 9102020), (4, 4551010), (5, 3640808), (8, 2275505), (10, 1820404), (20, 910202), (23, 791480), (40, 455101), (46, 395740), (47, 387320), (92, 197870), (94, 193660), (115, 158296), (184, 98935), (188, 96830), (230, 79148), (235, 77464), (376, 48415), (421, 43240), (460, 39574), (470, 38732), (842, 21620), (920, 19787), (940, 19366), (1081, 16840), (1684, 10810), (1880, 9683), (2105, 8648), (2162, 8420), (3368, 5405), (4210, 4324)]