20452000

素因数分解:

$2^5\times 5^3\times {\mathrm{5113}}^1$

素因数の和:5138

約数の個数: 48

約数和(自身を含む): 50260392

約数和(自身を除く): 29808392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5113, 10226, 20452, 25565, 40904, 51130, 81808, 102260, 127825, 163616, 204520, 255650, 409040, 511300, 639125, 818080, 1022600, 1278250, 2045200, 2556500, 4090400, 5113000, 10226000, 20452000]

約数ペア:

[(1, 20452000), (2, 10226000), (4, 5113000), (5, 4090400), (8, 2556500), (10, 2045200), (16, 1278250), (20, 1022600), (25, 818080), (32, 639125), (40, 511300), (50, 409040), (80, 255650), (100, 204520), (125, 163616), (160, 127825), (200, 102260), (250, 81808), (400, 51130), (500, 40904), (800, 25565), (1000, 20452), (2000, 10226), (4000, 5113)]