20988920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27617}}^1$

素因数の和:27647

約数の個数: 32

約数和(自身を含む): 49712400

約数和(自身を除く): 28723480

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27617, 55234, 110468, 138085, 220936, 276170, 524723, 552340, 1049446, 1104680, 2098892, 2623615, 4197784, 5247230, 10494460, 20988920]

約数ペア:

[(1, 20988920), (2, 10494460), (4, 5247230), (5, 4197784), (8, 2623615), (10, 2098892), (19, 1104680), (20, 1049446), (38, 552340), (40, 524723), (76, 276170), (95, 220936), (152, 138085), (190, 110468), (380, 55234), (760, 27617)]