21691208

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1531}}^1$

素因数の和:1578

約数の個数: 64

約数和(自身を含む): 52945920

約数和(自身を除く): 31254712

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 23, 28, 44, 46, 56, 77, 88, 92, 154, 161, 184, 253, 308, 322, 506, 616, 644, 1012, 1288, 1531, 1771, 2024, 3062, 3542, 6124, 7084, 10717, 12248, 14168, 16841, 21434, 33682, 35213, 42868, 67364, 70426, 85736, 117887, 134728, 140852, 235774, 246491, 281704, 387343, 471548, 492982, 774686, 943096, 985964, 1549372, 1971928, 2711401, 3098744, 5422802, 10845604, 21691208]

約数ペア:

[(1, 21691208), (2, 10845604), (4, 5422802), (7, 3098744), (8, 2711401), (11, 1971928), (14, 1549372), (22, 985964), (23, 943096), (28, 774686), (44, 492982), (46, 471548), (56, 387343), (77, 281704), (88, 246491), (92, 235774), (154, 140852), (161, 134728), (184, 117887), (253, 85736), (308, 70426), (322, 67364), (506, 42868), (616, 35213), (644, 33682), (1012, 21434), (1288, 16841), (1531, 14168), (1771, 12248), (2024, 10717), (3062, 7084), (3542, 6124)]