21000656

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{383}}^1$

素因数の和:563

約数の個数: 40

約数和(自身を含む): 42854400

約数和(自身を除く): 21853744

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 149, 184, 298, 368, 383, 596, 766, 1192, 1532, 2384, 3064, 3427, 6128, 6854, 8809, 13708, 17618, 27416, 35236, 54832, 57067, 70472, 114134, 140944, 228268, 456536, 913072, 1312541, 2625082, 5250164, 10500328, 21000656]

約数ペア:

[(1, 21000656), (2, 10500328), (4, 5250164), (8, 2625082), (16, 1312541), (23, 913072), (46, 456536), (92, 228268), (149, 140944), (184, 114134), (298, 70472), (368, 57067), (383, 54832), (596, 35236), (766, 27416), (1192, 17618), (1532, 13708), (2384, 8809), (3064, 6854), (3427, 6128)]