18354920

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:386

約数の個数: 64

約数和(自身を含む): 43856640

約数和(自身を除く): 25501720

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 71, 92, 115, 142, 184, 230, 281, 284, 355, 460, 562, 568, 710, 920, 1124, 1405, 1420, 1633, 2248, 2810, 2840, 3266, 5620, 6463, 6532, 8165, 11240, 12926, 13064, 16330, 19951, 25852, 32315, 32660, 39902, 51704, 64630, 65320, 79804, 99755, 129260, 159608, 199510, 258520, 399020, 458873, 798040, 917746, 1835492, 2294365, 3670984, 4588730, 9177460, 18354920]

約数ペア:

[(1, 18354920), (2, 9177460), (4, 4588730), (5, 3670984), (8, 2294365), (10, 1835492), (20, 917746), (23, 798040), (40, 458873), (46, 399020), (71, 258520), (92, 199510), (115, 159608), (142, 129260), (184, 99755), (230, 79804), (281, 65320), (284, 64630), (355, 51704), (460, 39902), (562, 32660), (568, 32315), (710, 25852), (920, 19951), (1124, 16330), (1405, 13064), (1420, 12926), (1633, 11240), (2248, 8165), (2810, 6532), (2840, 6463), (3266, 5620)]