19817715

素因数分解:

$3^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{127}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 32587776

約数和(自身を除く): 12770061

約数列:

[1, 3, 5, 15, 101, 103, 127, 303, 309, 381, 505, 515, 635, 1515, 1545, 1905, 10403, 12827, 13081, 31209, 38481, 39243, 52015, 64135, 65405, 156045, 192405, 196215, 1321181, 3963543, 6605905, 19817715]

約数ペア:

[(1, 19817715), (3, 6605905), (5, 3963543), (15, 1321181), (101, 196215), (103, 192405), (127, 156045), (303, 65405), (309, 64135), (381, 52015), (505, 39243), (515, 38481), (635, 31209), (1515, 13081), (1545, 12827), (1905, 10403)]