20439180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{4937}}^1$

素因数の和:4975

約数の個数: 72

約数和(自身を含む): 64707552

約数和(自身を除く): 44268372

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 4937, 9874, 14811, 19748, 24685, 29622, 44433, 49370, 59244, 74055, 88866, 98740, 113551, 148110, 177732, 222165, 227102, 296220, 340653, 444330, 454204, 567755, 681306, 888660, 1021959, 1135510, 1362612, 1703265, 2043918, 2271020, 3406530, 4087836, 5109795, 6813060, 10219590, 20439180]

約数ペア:

[(1, 20439180), (2, 10219590), (3, 6813060), (4, 5109795), (5, 4087836), (6, 3406530), (9, 2271020), (10, 2043918), (12, 1703265), (15, 1362612), (18, 1135510), (20, 1021959), (23, 888660), (30, 681306), (36, 567755), (45, 454204), (46, 444330), (60, 340653), (69, 296220), (90, 227102), (92, 222165), (115, 177732), (138, 148110), (180, 113551), (207, 98740), (230, 88866), (276, 74055), (345, 59244), (414, 49370), (460, 44433), (690, 29622), (828, 24685), (1035, 19748), (1380, 14811), (2070, 9874), (4140, 4937)]