21478778

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{71}}^1\times {\mathrm{419}}^1$

素因数の和:530

約数の個数: 24

約数和(自身を含む): 34564320

約数和(自身を除く): 13085542

約数列:

[1, 2, 19, 38, 71, 142, 361, 419, 722, 838, 1349, 2698, 7961, 15922, 25631, 29749, 51262, 59498, 151259, 302518, 565231, 1130462, 10739389, 21478778]

約数ペア:

[(1, 21478778), (2, 10739389), (19, 1130462), (38, 565231), (71, 302518), (142, 151259), (361, 59498), (419, 51262), (722, 29749), (838, 25631), (1349, 15922), (2698, 7961)]