21019788

素因数分解:

$2^2\times 3^2\times {\mathrm{157}}^1\times {\mathrm{3719}}^1$

素因数の和:3886

約数の個数: 36

約数和(自身を含む): 53486160

約数和(自身を除く): 32466372

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 157, 314, 471, 628, 942, 1413, 1884, 2826, 3719, 5652, 7438, 11157, 14876, 22314, 33471, 44628, 66942, 133884, 583883, 1167766, 1751649, 2335532, 3503298, 5254947, 7006596, 10509894, 21019788]

約数ペア:

[(1, 21019788), (2, 10509894), (3, 7006596), (4, 5254947), (6, 3503298), (9, 2335532), (12, 1751649), (18, 1167766), (36, 583883), (157, 133884), (314, 66942), (471, 44628), (628, 33471), (942, 22314), (1413, 14876), (1884, 11157), (2826, 7438), (3719, 5652)]