21431840

素因数分解:

$2^5\times 5^1\times {\mathrm{133949}}^1$

素因数の和:133964

約数の個数: 24

約数和(自身を含む): 50633100

約数和(自身を除く): 29201260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133949, 267898, 535796, 669745, 1071592, 1339490, 2143184, 2678980, 4286368, 5357960, 10715920, 21431840]

約数ペア:

[(1, 21431840), (2, 10715920), (4, 5357960), (5, 4286368), (8, 2678980), (10, 2143184), (16, 1339490), (20, 1071592), (32, 669745), (40, 535796), (80, 267898), (160, 133949)]