18809320

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 44323200

約数和(自身を除く): 25513880

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 71, 74, 142, 148, 179, 185, 284, 296, 355, 358, 370, 568, 710, 716, 740, 895, 1420, 1432, 1480, 1790, 2627, 2840, 3580, 5254, 6623, 7160, 10508, 12709, 13135, 13246, 21016, 25418, 26270, 26492, 33115, 50836, 52540, 52984, 63545, 66230, 101672, 105080, 127090, 132460, 254180, 264920, 470233, 508360, 940466, 1880932, 2351165, 3761864, 4702330, 9404660, 18809320]

約数ペア:

[(1, 18809320), (2, 9404660), (4, 4702330), (5, 3761864), (8, 2351165), (10, 1880932), (20, 940466), (37, 508360), (40, 470233), (71, 264920), (74, 254180), (142, 132460), (148, 127090), (179, 105080), (185, 101672), (284, 66230), (296, 63545), (355, 52984), (358, 52540), (370, 50836), (568, 33115), (710, 26492), (716, 26270), (740, 25418), (895, 21016), (1420, 13246), (1432, 13135), (1480, 12709), (1790, 10508), (2627, 7160), (2840, 6623), (3580, 5254)]