21388360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76387}}^1$

素因数の和:76405

約数の個数: 32

約数和(自身を含む): 54999360

約数和(自身を除く): 33611000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76387, 152774, 305548, 381935, 534709, 611096, 763870, 1069418, 1527740, 2138836, 2673545, 3055480, 4277672, 5347090, 10694180, 21388360]

約数ペア:

[(1, 21388360), (2, 10694180), (4, 5347090), (5, 4277672), (7, 3055480), (8, 2673545), (10, 2138836), (14, 1527740), (20, 1069418), (28, 763870), (35, 611096), (40, 534709), (56, 381935), (70, 305548), (140, 152774), (280, 76387)]