20814375

素因数分解:

$3^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{653}}^1$

素因数の和:693

約数の個数: 40

約数和(自身を含む): 36775728

約数和(自身を除く): 15961353

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 125, 255, 375, 425, 625, 653, 1275, 1875, 1959, 2125, 3265, 6375, 9795, 10625, 11101, 16325, 31875, 33303, 48975, 55505, 81625, 166515, 244875, 277525, 408125, 832575, 1224375, 1387625, 4162875, 6938125, 20814375]

約数ペア:

[(1, 20814375), (3, 6938125), (5, 4162875), (15, 1387625), (17, 1224375), (25, 832575), (51, 408125), (75, 277525), (85, 244875), (125, 166515), (255, 81625), (375, 55505), (425, 48975), (625, 33303), (653, 31875), (1275, 16325), (1875, 11101), (1959, 10625), (2125, 9795), (3265, 6375)]