21428379

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2447}}^1$

素因数の和:2599

約数の個数: 24

約数和(自身を含む): 35642880

約数和(自身を除く): 14214501

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2447, 2919, 7341, 8757, 17129, 22023, 51387, 154161, 340133, 1020399, 2380931, 3061197, 7142793, 21428379]

約数ペア:

[(1, 21428379), (3, 7142793), (7, 3061197), (9, 2380931), (21, 1020399), (63, 340133), (139, 154161), (417, 51387), (973, 22023), (1251, 17129), (2447, 8757), (2919, 7341)]