21211956

素因数分解:

$2^2\times 3^5\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 56361760

約数和(自身を除く): 35149804

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 139, 157, 162, 243, 278, 314, 324, 417, 471, 486, 556, 628, 834, 942, 972, 1251, 1413, 1668, 1884, 2502, 2826, 3753, 4239, 5004, 5652, 7506, 8478, 11259, 12717, 15012, 16956, 21823, 22518, 25434, 33777, 38151, 43646, 45036, 50868, 65469, 67554, 76302, 87292, 130938, 135108, 152604, 196407, 261876, 392814, 589221, 785628, 1178442, 1767663, 2356884, 3535326, 5302989, 7070652, 10605978, 21211956]

約数ペア:

[(1, 21211956), (2, 10605978), (3, 7070652), (4, 5302989), (6, 3535326), (9, 2356884), (12, 1767663), (18, 1178442), (27, 785628), (36, 589221), (54, 392814), (81, 261876), (108, 196407), (139, 152604), (157, 135108), (162, 130938), (243, 87292), (278, 76302), (314, 67554), (324, 65469), (417, 50868), (471, 45036), (486, 43646), (556, 38151), (628, 33777), (834, 25434), (942, 22518), (972, 21823), (1251, 16956), (1413, 15012), (1668, 12717), (1884, 11259), (2502, 8478), (2826, 7506), (3753, 5652), (4239, 5004)]