561289720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1\times {\mathrm{1297}}^1$

素因数の和:1688

約数の個数: 64

約数和(自身を含む): 1308384000

約数和(自身を除く): 747094280

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 349, 620, 698, 1240, 1297, 1396, 1745, 2594, 2792, 3490, 5188, 6485, 6980, 10376, 10819, 12970, 13960, 21638, 25940, 40207, 43276, 51880, 54095, 80414, 86552, 108190, 160828, 201035, 216380, 321656, 402070, 432760, 452653, 804140, 905306, 1608280, 1810612, 2263265, 3621224, 4526530, 9053060, 14032243, 18106120, 28064486, 56128972, 70161215, 112257944, 140322430, 280644860, 561289720]

約数ペア:

[(1, 561289720), (2, 280644860), (4, 140322430), (5, 112257944), (8, 70161215), (10, 56128972), (20, 28064486), (31, 18106120), (40, 14032243), (62, 9053060), (124, 4526530), (155, 3621224), (248, 2263265), (310, 1810612), (349, 1608280), (620, 905306), (698, 804140), (1240, 452653), (1297, 432760), (1396, 402070), (1745, 321656), (2594, 216380), (2792, 201035), (3490, 160828), (5188, 108190), (6485, 86552), (6980, 80414), (10376, 54095), (10819, 51880), (12970, 43276), (13960, 40207), (21638, 25940)]