20514910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:293

約数の個数: 48

約数和(自身を含む): 40845600

約数和(自身を除く): 20330690

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 169, 199, 305, 338, 398, 610, 793, 845, 995, 1586, 1690, 1990, 2587, 3965, 5174, 7930, 10309, 12139, 12935, 20618, 24278, 25870, 33631, 51545, 60695, 67262, 103090, 121390, 157807, 168155, 315614, 336310, 789035, 1578070, 2051491, 4102982, 10257455, 20514910]

約数ペア:

[(1, 20514910), (2, 10257455), (5, 4102982), (10, 2051491), (13, 1578070), (26, 789035), (61, 336310), (65, 315614), (122, 168155), (130, 157807), (169, 121390), (199, 103090), (305, 67262), (338, 60695), (398, 51545), (610, 33631), (793, 25870), (845, 24278), (995, 20618), (1586, 12935), (1690, 12139), (1990, 10309), (2587, 7930), (3965, 5174)]