21379472

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{947}}^1$

素因数の和:1055

約数の個数: 40

約数和(自身を含む): 44434656

約数和(自身を除く): 23055184

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 83, 136, 166, 272, 332, 664, 947, 1328, 1411, 1894, 2822, 3788, 5644, 7576, 11288, 15152, 16099, 22576, 32198, 64396, 78601, 128792, 157202, 257584, 314404, 628808, 1257616, 1336217, 2672434, 5344868, 10689736, 21379472]

約数ペア:

[(1, 21379472), (2, 10689736), (4, 5344868), (8, 2672434), (16, 1336217), (17, 1257616), (34, 628808), (68, 314404), (83, 257584), (136, 157202), (166, 128792), (272, 78601), (332, 64396), (664, 32198), (947, 22576), (1328, 16099), (1411, 15152), (1894, 11288), (2822, 7576), (3788, 5644)]