20356420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1499}}^1$

素因数の和:1612

約数の個数: 48

約数和(自身を含む): 49392000

約数和(自身を除く): 29035580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1499, 1940, 2716, 2998, 3395, 5996, 6790, 7495, 10493, 13580, 14990, 20986, 29980, 41972, 52465, 104930, 145403, 209860, 290806, 581612, 727015, 1017821, 1454030, 2035642, 2908060, 4071284, 5089105, 10178210, 20356420]

約数ペア:

[(1, 20356420), (2, 10178210), (4, 5089105), (5, 4071284), (7, 2908060), (10, 2035642), (14, 1454030), (20, 1017821), (28, 727015), (35, 581612), (70, 290806), (97, 209860), (140, 145403), (194, 104930), (388, 52465), (485, 41972), (679, 29980), (970, 20986), (1358, 14990), (1499, 13580), (1940, 10493), (2716, 7495), (2998, 6790), (3395, 5996)]