123578920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{75353}}^1$

素因数の和:75405

約数の個数: 32

約数和(自身を含む): 284838120

約数和(自身を除く): 161259200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 75353, 150706, 301412, 376765, 602824, 753530, 1507060, 3014120, 3089473, 6178946, 12357892, 15447365, 24715784, 30894730, 61789460, 123578920]

約数ペア:

[(1, 123578920), (2, 61789460), (4, 30894730), (5, 24715784), (8, 15447365), (10, 12357892), (20, 6178946), (40, 3089473), (41, 3014120), (82, 1507060), (164, 753530), (205, 602824), (328, 376765), (410, 301412), (820, 150706), (1640, 75353)]