12487780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 27313776

約数和(自身を除く): 14825996

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 97, 157, 164, 194, 205, 314, 388, 410, 485, 628, 785, 820, 970, 1570, 1940, 3140, 3977, 6437, 7954, 12874, 15229, 15908, 19885, 25748, 30458, 32185, 39770, 60916, 64370, 76145, 79540, 128740, 152290, 304580, 624389, 1248778, 2497556, 3121945, 6243890, 12487780]

約数ペア:

[(1, 12487780), (2, 6243890), (4, 3121945), (5, 2497556), (10, 1248778), (20, 624389), (41, 304580), (82, 152290), (97, 128740), (157, 79540), (164, 76145), (194, 64370), (205, 60916), (314, 39770), (388, 32185), (410, 30458), (485, 25748), (628, 19885), (785, 15908), (820, 15229), (970, 12874), (1570, 7954), (1940, 6437), (3140, 3977)]