19902915

素因数分解:

$3^5\times 5^1\times {\mathrm{16381}}^1$

素因数の和:16401

約数の個数: 24

約数和(自身を含む): 35778288

約数和(自身を除く): 15875373

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 16381, 49143, 81905, 147429, 245715, 442287, 737145, 1326861, 2211435, 3980583, 6634305, 19902915]

約数ペア:

[(1, 19902915), (3, 6634305), (5, 3980583), (9, 2211435), (15, 1326861), (27, 737145), (45, 442287), (81, 245715), (135, 147429), (243, 81905), (405, 49143), (1215, 16381)]