21900416

素因数分解:

$2^7\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:253

約数の個数: 64

約数和(自身を含む): 46854720

約数和(自身を除く): 24954304

約数列:

[1, 2, 4, 8, 16, 23, 32, 43, 46, 64, 86, 92, 128, 172, 173, 184, 344, 346, 368, 688, 692, 736, 989, 1376, 1384, 1472, 1978, 2752, 2768, 2944, 3956, 3979, 5504, 5536, 7439, 7912, 7958, 11072, 14878, 15824, 15916, 22144, 29756, 31648, 31832, 59512, 63296, 63664, 119024, 126592, 127328, 171097, 238048, 254656, 342194, 476096, 509312, 684388, 952192, 1368776, 2737552, 5475104, 10950208, 21900416]

約数ペア:

[(1, 21900416), (2, 10950208), (4, 5475104), (8, 2737552), (16, 1368776), (23, 952192), (32, 684388), (43, 509312), (46, 476096), (64, 342194), (86, 254656), (92, 238048), (128, 171097), (172, 127328), (173, 126592), (184, 119024), (344, 63664), (346, 63296), (368, 59512), (688, 31832), (692, 31648), (736, 29756), (989, 22144), (1376, 15916), (1384, 15824), (1472, 14878), (1978, 11072), (2752, 7958), (2768, 7912), (2944, 7439), (3956, 5536), (3979, 5504)]