21187916

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{5879}}^1$

素因数の和:5953

約数の個数: 24

約数和(自身を含む): 40007520

約数和(自身を除く): 18819604

約数列:

[1, 2, 4, 17, 34, 53, 68, 106, 212, 901, 1802, 3604, 5879, 11758, 23516, 99943, 199886, 311587, 399772, 623174, 1246348, 5296979, 10593958, 21187916]

約数ペア:

[(1, 21187916), (2, 10593958), (4, 5296979), (17, 1246348), (34, 623174), (53, 399772), (68, 311587), (106, 199886), (212, 99943), (901, 23516), (1802, 11758), (3604, 5879)]