21435856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{401}}^1$

素因数の和:679

約数の個数: 40

約数和(自身を含む): 45012744

約数和(自身を除く): 23576888

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 257, 401, 514, 802, 1028, 1604, 2056, 3208, 3341, 4112, 5213, 6416, 6682, 10426, 13364, 20852, 26728, 41704, 53456, 83408, 103057, 206114, 412228, 824456, 1339741, 1648912, 2679482, 5358964, 10717928, 21435856]

約数ペア:

[(1, 21435856), (2, 10717928), (4, 5358964), (8, 2679482), (13, 1648912), (16, 1339741), (26, 824456), (52, 412228), (104, 206114), (208, 103057), (257, 83408), (401, 53456), (514, 41704), (802, 26728), (1028, 20852), (1604, 13364), (2056, 10426), (3208, 6682), (3341, 6416), (4112, 5213)]