16720749

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{6659}}^1$

素因数の和:6702

約数の個数: 20

約数和(自身を含む): 25787520

約数和(自身を除く): 9066771

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 6659, 19977, 59931, 179793, 206429, 539379, 619287, 1857861, 5573583, 16720749]

約数ペア:

[(1, 16720749), (3, 5573583), (9, 1857861), (27, 619287), (31, 539379), (81, 206429), (93, 179793), (279, 59931), (837, 19977), (2511, 6659)]