18178840

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{173}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 42845760

約数和(自身を除く): 24666920

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 71, 74, 142, 148, 173, 185, 284, 296, 346, 355, 370, 568, 692, 710, 740, 865, 1384, 1420, 1480, 1730, 2627, 2840, 3460, 5254, 6401, 6920, 10508, 12283, 12802, 13135, 21016, 24566, 25604, 26270, 32005, 49132, 51208, 52540, 61415, 64010, 98264, 105080, 122830, 128020, 245660, 256040, 454471, 491320, 908942, 1817884, 2272355, 3635768, 4544710, 9089420, 18178840]

約数ペア:

[(1, 18178840), (2, 9089420), (4, 4544710), (5, 3635768), (8, 2272355), (10, 1817884), (20, 908942), (37, 491320), (40, 454471), (71, 256040), (74, 245660), (142, 128020), (148, 122830), (173, 105080), (185, 98264), (284, 64010), (296, 61415), (346, 52540), (355, 51208), (370, 49132), (568, 32005), (692, 26270), (710, 25604), (740, 24566), (865, 21016), (1384, 13135), (1420, 12802), (1480, 12283), (1730, 10508), (2627, 6920), (2840, 6401), (3460, 5254)]