21851912

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{457}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 42319200

約数和(自身を除く): 20467288

約数列:

[1, 2, 4, 8, 43, 86, 139, 172, 278, 344, 457, 556, 914, 1112, 1828, 3656, 5977, 11954, 19651, 23908, 39302, 47816, 63523, 78604, 127046, 157208, 254092, 508184, 2731489, 5462978, 10925956, 21851912]

約数ペア:

[(1, 21851912), (2, 10925956), (4, 5462978), (8, 2731489), (43, 508184), (86, 254092), (139, 157208), (172, 127046), (278, 78604), (344, 63523), (457, 47816), (556, 39302), (914, 23908), (1112, 19651), (1828, 11954), (3656, 5977)]