18919251

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{113}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 31370976

約数和(自身を除く): 12451725

約数列:

[1, 3, 9, 13, 27, 39, 53, 81, 113, 117, 159, 243, 339, 351, 477, 689, 1017, 1053, 1431, 1469, 2067, 3051, 3159, 4293, 4407, 5989, 6201, 9153, 12879, 13221, 17967, 18603, 27459, 39663, 53901, 55809, 77857, 118989, 161703, 167427, 233571, 356967, 485109, 700713, 1455327, 2102139, 6306417, 18919251]

約数ペア:

[(1, 18919251), (3, 6306417), (9, 2102139), (13, 1455327), (27, 700713), (39, 485109), (53, 356967), (81, 233571), (113, 167427), (117, 161703), (159, 118989), (243, 77857), (339, 55809), (351, 53901), (477, 39663), (689, 27459), (1017, 18603), (1053, 17967), (1431, 13221), (1469, 12879), (2067, 9153), (3051, 6201), (3159, 5989), (4293, 4407)]