20954780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1237}}^1$

素因数の和:1275

約数の個数: 72

約数和(自身を含む): 55323744

約数和(自身を除く): 34368964

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1210, 1237, 1540, 1694, 2420, 2474, 3388, 4235, 4948, 6185, 8470, 8659, 12370, 13607, 16940, 17318, 24740, 27214, 34636, 43295, 54428, 68035, 86590, 95249, 136070, 149677, 173180, 190498, 272140, 299354, 380996, 476245, 598708, 748385, 952490, 1047739, 1496770, 1904980, 2095478, 2993540, 4190956, 5238695, 10477390, 20954780]

約数ペア:

[(1, 20954780), (2, 10477390), (4, 5238695), (5, 4190956), (7, 2993540), (10, 2095478), (11, 1904980), (14, 1496770), (20, 1047739), (22, 952490), (28, 748385), (35, 598708), (44, 476245), (55, 380996), (70, 299354), (77, 272140), (110, 190498), (121, 173180), (140, 149677), (154, 136070), (220, 95249), (242, 86590), (308, 68035), (385, 54428), (484, 43295), (605, 34636), (770, 27214), (847, 24740), (1210, 17318), (1237, 16940), (1540, 13607), (1694, 12370), (2420, 8659), (2474, 8470), (3388, 6185), (4235, 4948)]