20382500

素因数分解:

$2^2\times 5^4\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:318

約数の個数: 60

約数和(自身を含む): 46185216

約数和(自身を除く): 25802716

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 155, 250, 263, 310, 500, 526, 620, 625, 775, 1052, 1250, 1315, 1550, 2500, 2630, 3100, 3875, 5260, 6575, 7750, 8153, 13150, 15500, 16306, 19375, 26300, 32612, 32875, 38750, 40765, 65750, 77500, 81530, 131500, 163060, 164375, 203825, 328750, 407650, 657500, 815300, 1019125, 2038250, 4076500, 5095625, 10191250, 20382500]

約数ペア:

[(1, 20382500), (2, 10191250), (4, 5095625), (5, 4076500), (10, 2038250), (20, 1019125), (25, 815300), (31, 657500), (50, 407650), (62, 328750), (100, 203825), (124, 164375), (125, 163060), (155, 131500), (250, 81530), (263, 77500), (310, 65750), (500, 40765), (526, 38750), (620, 32875), (625, 32612), (775, 26300), (1052, 19375), (1250, 16306), (1315, 15500), (1550, 13150), (2500, 8153), (2630, 7750), (3100, 6575), (3875, 5260)]