21890869

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1151}}^1$

素因数の和:1201

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9074891

約数列:

[1, 7, 11, 13, 19, 77, 91, 133, 143, 209, 247, 1001, 1151, 1463, 1729, 2717, 8057, 12661, 14963, 19019, 21869, 88627, 104741, 153083, 164593, 240559, 284297, 1152151, 1683913, 1990079, 3127267, 21890869]

約数ペア:

[(1, 21890869), (7, 3127267), (11, 1990079), (13, 1683913), (19, 1152151), (77, 284297), (91, 240559), (133, 164593), (143, 153083), (209, 104741), (247, 88627), (1001, 21869), (1151, 19019), (1463, 14963), (1729, 12661), (2717, 8057)]