21539973

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{78901}}^1$

素因数の和:78924

約数の個数: 16

約数和(自身を含む): 35348096

約数和(自身を除く): 13808123

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 78901, 236703, 552307, 1025713, 1656921, 3077139, 7179991, 21539973]

約数ペア:

[(1, 21539973), (3, 7179991), (7, 3077139), (13, 1656921), (21, 1025713), (39, 552307), (91, 236703), (273, 78901)]