21671265

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{647}}^1$

素因数の和:702

約数の個数: 64

約数和(自身を含む): 44789760

約数和(自身を除く): 23118495

約数列:

[1, 3, 5, 7, 11, 15, 21, 29, 33, 35, 55, 77, 87, 105, 145, 165, 203, 231, 319, 385, 435, 609, 647, 957, 1015, 1155, 1595, 1941, 2233, 3045, 3235, 4529, 4785, 6699, 7117, 9705, 11165, 13587, 18763, 21351, 22645, 33495, 35585, 49819, 56289, 67935, 93815, 106755, 131341, 149457, 206393, 249095, 281445, 394023, 619179, 656705, 747285, 1031965, 1444751, 1970115, 3095895, 4334253, 7223755, 21671265]

約数ペア:

[(1, 21671265), (3, 7223755), (5, 4334253), (7, 3095895), (11, 1970115), (15, 1444751), (21, 1031965), (29, 747285), (33, 656705), (35, 619179), (55, 394023), (77, 281445), (87, 249095), (105, 206393), (145, 149457), (165, 131341), (203, 106755), (231, 93815), (319, 67935), (385, 56289), (435, 49819), (609, 35585), (647, 33495), (957, 22645), (1015, 21351), (1155, 18763), (1595, 13587), (1941, 11165), (2233, 9705), (3045, 7117), (3235, 6699), (4529, 4785)]