20948240

素因数分解:

$2^4\times 5^1\times {\mathrm{401}}^1\times {\mathrm{653}}^1$

素因数の和:1067

約数の個数: 40

約数和(自身を含む): 48900888

約数和(自身を除く): 27952648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 401, 653, 802, 1306, 1604, 2005, 2612, 3208, 3265, 4010, 5224, 6416, 6530, 8020, 10448, 13060, 16040, 26120, 32080, 52240, 261853, 523706, 1047412, 1309265, 2094824, 2618530, 4189648, 5237060, 10474120, 20948240]

約数ペア:

[(1, 20948240), (2, 10474120), (4, 5237060), (5, 4189648), (8, 2618530), (10, 2094824), (16, 1309265), (20, 1047412), (40, 523706), (80, 261853), (401, 52240), (653, 32080), (802, 26120), (1306, 16040), (1604, 13060), (2005, 10448), (2612, 8020), (3208, 6530), (3265, 6416), (4010, 5224)]