18038500

素因数分解:

$2^2\times 5^3\times {\mathrm{43}}^1\times {\mathrm{839}}^1$

素因数の和:901

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 22321820

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 125, 172, 215, 250, 430, 500, 839, 860, 1075, 1678, 2150, 3356, 4195, 4300, 5375, 8390, 10750, 16780, 20975, 21500, 36077, 41950, 72154, 83900, 104875, 144308, 180385, 209750, 360770, 419500, 721540, 901925, 1803850, 3607700, 4509625, 9019250, 18038500]

約数ペア:

[(1, 18038500), (2, 9019250), (4, 4509625), (5, 3607700), (10, 1803850), (20, 901925), (25, 721540), (43, 419500), (50, 360770), (86, 209750), (100, 180385), (125, 144308), (172, 104875), (215, 83900), (250, 72154), (430, 41950), (500, 36077), (839, 21500), (860, 20975), (1075, 16780), (1678, 10750), (2150, 8390), (3356, 5375), (4195, 4300)]