64936180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{191}}^2$

素因数の和:480

約数の個数: 36

約数和(自身を含む): 138623940

約数和(自身を除く): 73687760

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 191, 356, 382, 445, 764, 890, 955, 1780, 1910, 3820, 16999, 33998, 36481, 67996, 72962, 84995, 145924, 169990, 182405, 339980, 364810, 729620, 3246809, 6493618, 12987236, 16234045, 32468090, 64936180]

約数ペア:

[(1, 64936180), (2, 32468090), (4, 16234045), (5, 12987236), (10, 6493618), (20, 3246809), (89, 729620), (178, 364810), (191, 339980), (356, 182405), (382, 169990), (445, 145924), (764, 84995), (890, 72962), (955, 67996), (1780, 36481), (1910, 33998), (3820, 16999)]