20561476

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{1987}}^1$

素因数の和:2203

約数の個数: 24

約数和(自身を含む): 38964800

約数和(自身を除く): 18403324

約数列:

[1, 2, 4, 13, 26, 52, 199, 398, 796, 1987, 2587, 3974, 5174, 7948, 10348, 25831, 51662, 103324, 395413, 790826, 1581652, 5140369, 10280738, 20561476]

約数ペア:

[(1, 20561476), (2, 10280738), (4, 5140369), (13, 1581652), (26, 790826), (52, 395413), (199, 103324), (398, 51662), (796, 25831), (1987, 10348), (2587, 7948), (3974, 5174)]