21191105

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{3361}}^1$

素因数の和:3476

約数の個数: 16

約数和(自身を含む): 27675984

約数和(自身を除く): 6484879

約数列:

[1, 5, 13, 65, 97, 485, 1261, 3361, 6305, 16805, 43693, 218465, 326017, 1630085, 4238221, 21191105]

約数ペア:

[(1, 21191105), (5, 4238221), (13, 1630085), (65, 326017), (97, 218465), (485, 43693), (1261, 16805), (3361, 6305)]