18716020

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 43200360

約数和(自身を除く): 24484340

約数列:

[1, 2, 4, 5, 10, 20, 23, 29, 46, 58, 61, 92, 115, 116, 122, 145, 230, 244, 290, 305, 460, 529, 580, 610, 667, 1058, 1220, 1334, 1403, 1769, 2116, 2645, 2668, 2806, 3335, 3538, 5290, 5612, 6670, 7015, 7076, 8845, 10580, 13340, 14030, 15341, 17690, 28060, 30682, 32269, 35380, 40687, 61364, 64538, 76705, 81374, 129076, 153410, 161345, 162748, 203435, 306820, 322690, 406870, 645380, 813740, 935801, 1871602, 3743204, 4679005, 9358010, 18716020]

約数ペア:

[(1, 18716020), (2, 9358010), (4, 4679005), (5, 3743204), (10, 1871602), (20, 935801), (23, 813740), (29, 645380), (46, 406870), (58, 322690), (61, 306820), (92, 203435), (115, 162748), (116, 161345), (122, 153410), (145, 129076), (230, 81374), (244, 76705), (290, 64538), (305, 61364), (460, 40687), (529, 35380), (580, 32269), (610, 30682), (667, 28060), (1058, 17690), (1220, 15341), (1334, 14030), (1403, 13340), (1769, 10580), (2116, 8845), (2645, 7076), (2668, 7015), (2806, 6670), (3335, 5612), (3538, 5290)]