20145280

素因数分解:

$2^7\times 5^1\times {\mathrm{31477}}^1$

素因数の和:31496

約数の個数: 32

約数和(自身を含む): 48161340

約数和(自身を除く): 28016060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31477, 62954, 125908, 157385, 251816, 314770, 503632, 629540, 1007264, 1259080, 2014528, 2518160, 4029056, 5036320, 10072640, 20145280]

約数ペア:

[(1, 20145280), (2, 10072640), (4, 5036320), (5, 4029056), (8, 2518160), (10, 2014528), (16, 1259080), (20, 1007264), (32, 629540), (40, 503632), (64, 314770), (80, 251816), (128, 157385), (160, 125908), (320, 62954), (640, 31477)]