18205121109

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{645503}}^1$

素因数の和:645609

約数の個数: 32

約数和(自身を含む): 29744824320

約数和(自身を除く): 11539703211

約数列:

[1, 3, 7, 17, 21, 51, 79, 119, 237, 357, 553, 1343, 1659, 4029, 9401, 28203, 645503, 1936509, 4518521, 10973551, 13555563, 32920653, 50994737, 76814857, 152984211, 230444571, 356963159, 866910529, 1070889477, 2600731587, 6068373703, 18205121109]

約数ペア:

[(1, 18205121109), (3, 6068373703), (7, 2600731587), (17, 1070889477), (21, 866910529), (51, 356963159), (79, 230444571), (119, 152984211), (237, 76814857), (357, 50994737), (553, 32920653), (1343, 13555563), (1659, 10973551), (4029, 4518521), (9401, 1936509), (28203, 645503)]