81809560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1861}}^1$

素因数の和:2036

約数の個数: 64

約数和(自身を含む): 211821120

約数和(自身を除く): 130011560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 628, 785, 1099, 1256, 1570, 1861, 2198, 3140, 3722, 4396, 5495, 6280, 7444, 8792, 9305, 10990, 13027, 14888, 18610, 21980, 26054, 37220, 43960, 52108, 65135, 74440, 104216, 130270, 260540, 292177, 521080, 584354, 1168708, 1460885, 2045239, 2337416, 2921770, 4090478, 5843540, 8180956, 10226195, 11687080, 16361912, 20452390, 40904780, 81809560]

約数ペア:

[(1, 81809560), (2, 40904780), (4, 20452390), (5, 16361912), (7, 11687080), (8, 10226195), (10, 8180956), (14, 5843540), (20, 4090478), (28, 2921770), (35, 2337416), (40, 2045239), (56, 1460885), (70, 1168708), (140, 584354), (157, 521080), (280, 292177), (314, 260540), (628, 130270), (785, 104216), (1099, 74440), (1256, 65135), (1570, 52108), (1861, 43960), (2198, 37220), (3140, 26054), (3722, 21980), (4396, 18610), (5495, 14888), (6280, 13027), (7444, 10990), (8792, 9305)]