21106815

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2389}}^1$

素因数の和:2447

約数の個数: 32

約数和(自身を含む): 36710400

約数和(自身を除く): 15603585

約数列:

[1, 3, 5, 15, 19, 31, 57, 93, 95, 155, 285, 465, 589, 1767, 2389, 2945, 7167, 8835, 11945, 35835, 45391, 74059, 136173, 222177, 226955, 370295, 680865, 1110885, 1407121, 4221363, 7035605, 21106815]

約数ペア:

[(1, 21106815), (3, 7035605), (5, 4221363), (15, 1407121), (19, 1110885), (31, 680865), (57, 370295), (93, 226955), (95, 222177), (155, 136173), (285, 74059), (465, 45391), (589, 35835), (1767, 11945), (2389, 8835), (2945, 7167)]