20109520

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1453}}^1$

素因数の和:1639

約数の個数: 40

約数和(自身を含む): 47057256

約数和(自身を除く): 26947736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1453, 1730, 2768, 2906, 3460, 5812, 6920, 7265, 11624, 13840, 14530, 23248, 29060, 58120, 116240, 251369, 502738, 1005476, 1256845, 2010952, 2513690, 4021904, 5027380, 10054760, 20109520]

約数ペア:

[(1, 20109520), (2, 10054760), (4, 5027380), (5, 4021904), (8, 2513690), (10, 2010952), (16, 1256845), (20, 1005476), (40, 502738), (80, 251369), (173, 116240), (346, 58120), (692, 29060), (865, 23248), (1384, 14530), (1453, 13840), (1730, 11624), (2768, 7265), (2906, 6920), (3460, 5812)]