21003945

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{2647}}^1$

素因数の和:2701

約数の個数: 24

約数和(自身を含む): 35144256

約数和(自身を除く): 14140311

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 529, 1587, 2645, 2647, 7935, 7941, 13235, 39705, 60881, 182643, 304405, 913215, 1400263, 4200789, 7001315, 21003945]

約数ペア:

[(1, 21003945), (3, 7001315), (5, 4200789), (15, 1400263), (23, 913215), (69, 304405), (115, 182643), (345, 60881), (529, 39705), (1587, 13235), (2645, 7941), (2647, 7935)]