20376380

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{409}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 24257860

約数列:

[1, 2, 4, 5, 10, 20, 47, 53, 94, 106, 188, 212, 235, 265, 409, 470, 530, 818, 940, 1060, 1636, 2045, 2491, 4090, 4982, 8180, 9964, 12455, 19223, 21677, 24910, 38446, 43354, 49820, 76892, 86708, 96115, 108385, 192230, 216770, 384460, 433540, 1018819, 2037638, 4075276, 5094095, 10188190, 20376380]

約数ペア:

[(1, 20376380), (2, 10188190), (4, 5094095), (5, 4075276), (10, 2037638), (20, 1018819), (47, 433540), (53, 384460), (94, 216770), (106, 192230), (188, 108385), (212, 96115), (235, 86708), (265, 76892), (409, 49820), (470, 43354), (530, 38446), (818, 24910), (940, 21677), (1060, 19223), (1636, 12455), (2045, 9964), (2491, 8180), (4090, 4982)]