21691740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51647}}^1$

素因数の和:51666

約数の個数: 48

約数和(自身を含む): 69414912

約数和(自身を除く): 47723172

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51647, 103294, 154941, 206588, 258235, 309882, 361529, 516470, 619764, 723058, 774705, 1032940, 1084587, 1446116, 1549410, 1807645, 2169174, 3098820, 3615290, 4338348, 5422935, 7230580, 10845870, 21691740]

約数ペア:

[(1, 21691740), (2, 10845870), (3, 7230580), (4, 5422935), (5, 4338348), (6, 3615290), (7, 3098820), (10, 2169174), (12, 1807645), (14, 1549410), (15, 1446116), (20, 1084587), (21, 1032940), (28, 774705), (30, 723058), (35, 619764), (42, 516470), (60, 361529), (70, 309882), (84, 258235), (105, 206588), (140, 154941), (210, 103294), (420, 51647)]