20724855

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 13489545

約数列:

[1, 3, 5, 15, 53, 131, 159, 199, 265, 393, 597, 655, 795, 995, 1965, 2985, 6943, 10547, 20829, 26069, 31641, 34715, 52735, 78207, 104145, 130345, 158205, 391035, 1381657, 4144971, 6908285, 20724855]

約数ペア:

[(1, 20724855), (3, 6908285), (5, 4144971), (15, 1381657), (53, 391035), (131, 158205), (159, 130345), (199, 104145), (265, 78207), (393, 52735), (597, 34715), (655, 31641), (795, 26069), (995, 20829), (1965, 10547), (2985, 6943)]