20475500

素因数分解:

$2^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{1321}}^1$

素因数の和:1371

約数の個数: 48

約数和(自身を含む): 46195968

約数和(自身を除く): 25720468

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 155, 250, 310, 500, 620, 775, 1321, 1550, 2642, 3100, 3875, 5284, 6605, 7750, 13210, 15500, 26420, 33025, 40951, 66050, 81902, 132100, 163804, 165125, 204755, 330250, 409510, 660500, 819020, 1023775, 2047550, 4095100, 5118875, 10237750, 20475500]

約数ペア:

[(1, 20475500), (2, 10237750), (4, 5118875), (5, 4095100), (10, 2047550), (20, 1023775), (25, 819020), (31, 660500), (50, 409510), (62, 330250), (100, 204755), (124, 165125), (125, 163804), (155, 132100), (250, 81902), (310, 66050), (500, 40951), (620, 33025), (775, 26420), (1321, 15500), (1550, 13210), (2642, 7750), (3100, 6605), (3875, 5284)]