21284315

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{619}}^1$

素因数の和:683

約数の個数: 24

約数和(自身を含む): 28800240

約数和(自身を除く): 7515925

約数列:

[1, 5, 13, 23, 65, 115, 299, 529, 619, 1495, 2645, 3095, 6877, 8047, 14237, 34385, 40235, 71185, 185081, 327451, 925405, 1637255, 4256863, 21284315]

約数ペア:

[(1, 21284315), (5, 4256863), (13, 1637255), (23, 925405), (65, 327451), (115, 185081), (299, 71185), (529, 40235), (619, 34385), (1495, 14237), (2645, 8047), (3095, 6877)]