19780821

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{23633}}^1$

素因数の和:23673

約数の個数: 16

約数和(自身を含む): 30251520

約数和(自身を除く): 10470699

約数列:

[1, 3, 9, 27, 31, 93, 279, 837, 23633, 70899, 212697, 638091, 732623, 2197869, 6593607, 19780821]

約数ペア:

[(1, 19780821), (3, 6593607), (9, 2197869), (27, 732623), (31, 638091), (93, 212697), (279, 70899), (837, 23633)]