20881792

素因数分解:

$2^7\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 44724960

約数和(自身を除く): 23843168

約数列:

[1, 2, 4, 8, 16, 23, 32, 41, 46, 64, 82, 92, 128, 164, 173, 184, 328, 346, 368, 656, 692, 736, 943, 1312, 1384, 1472, 1886, 2624, 2768, 2944, 3772, 3979, 5248, 5536, 7093, 7544, 7958, 11072, 14186, 15088, 15916, 22144, 28372, 30176, 31832, 56744, 60352, 63664, 113488, 120704, 127328, 163139, 226976, 254656, 326278, 453952, 509312, 652556, 907904, 1305112, 2610224, 5220448, 10440896, 20881792]

約数ペア:

[(1, 20881792), (2, 10440896), (4, 5220448), (8, 2610224), (16, 1305112), (23, 907904), (32, 652556), (41, 509312), (46, 453952), (64, 326278), (82, 254656), (92, 226976), (128, 163139), (164, 127328), (173, 120704), (184, 113488), (328, 63664), (346, 60352), (368, 56744), (656, 31832), (692, 30176), (736, 28372), (943, 22144), (1312, 15916), (1384, 15088), (1472, 14186), (1886, 11072), (2624, 7958), (2768, 7544), (2944, 7093), (3772, 5536), (3979, 5248)]