18938975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1129}}^1$

素因数の和:1211

約数の個数: 24

約数和(自身を含む): 26062320

約数和(自身を除く): 7123345

約数列:

[1, 5, 11, 25, 55, 61, 275, 305, 671, 1129, 1525, 3355, 5645, 12419, 16775, 28225, 62095, 68869, 310475, 344345, 757559, 1721725, 3787795, 18938975]

約数ペア:

[(1, 18938975), (5, 3787795), (11, 1721725), (25, 757559), (55, 344345), (61, 310475), (275, 68869), (305, 62095), (671, 28225), (1129, 16775), (1525, 12419), (3355, 5645)]