25250000

素因数分解:

$2^4\times 5^6\times {\mathrm{101}}^1$

素因数の和:139

約数の個数: 70

約数和(自身を含む): 61757022

約数和(自身を除く): 36507022

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 125, 200, 202, 250, 400, 404, 500, 505, 625, 808, 1000, 1010, 1250, 1616, 2000, 2020, 2500, 2525, 3125, 4040, 5000, 5050, 6250, 8080, 10000, 10100, 12500, 12625, 15625, 20200, 25000, 25250, 31250, 40400, 50000, 50500, 62500, 63125, 101000, 125000, 126250, 202000, 250000, 252500, 315625, 505000, 631250, 1010000, 1262500, 1578125, 2525000, 3156250, 5050000, 6312500, 12625000, 25250000]

約数ペア:

[(1, 25250000), (2, 12625000), (4, 6312500), (5, 5050000), (8, 3156250), (10, 2525000), (16, 1578125), (20, 1262500), (25, 1010000), (40, 631250), (50, 505000), (80, 315625), (100, 252500), (101, 250000), (125, 202000), (200, 126250), (202, 125000), (250, 101000), (400, 63125), (404, 62500), (500, 50500), (505, 50000), (625, 40400), (808, 31250), (1000, 25250), (1010, 25000), (1250, 20200), (1616, 15625), (2000, 12625), (2020, 12500), (2500, 10100), (2525, 10000), (3125, 8080), (4040, 6250), (5000, 5050)]