20641212

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:387

約数の個数: 72

約数和(自身を含む): 55220256

約数和(自身を除く): 34579044

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 97, 138, 194, 207, 257, 276, 291, 388, 414, 514, 582, 771, 828, 873, 1028, 1164, 1542, 1746, 2231, 2313, 3084, 3492, 4462, 4626, 5911, 6693, 8924, 9252, 11822, 13386, 17733, 20079, 23644, 24929, 26772, 35466, 40158, 49858, 53199, 70932, 74787, 80316, 99716, 106398, 149574, 212796, 224361, 299148, 448722, 573367, 897444, 1146734, 1720101, 2293468, 3440202, 5160303, 6880404, 10320606, 20641212]

約数ペア:

[(1, 20641212), (2, 10320606), (3, 6880404), (4, 5160303), (6, 3440202), (9, 2293468), (12, 1720101), (18, 1146734), (23, 897444), (36, 573367), (46, 448722), (69, 299148), (92, 224361), (97, 212796), (138, 149574), (194, 106398), (207, 99716), (257, 80316), (276, 74787), (291, 70932), (388, 53199), (414, 49858), (514, 40158), (582, 35466), (771, 26772), (828, 24929), (873, 23644), (1028, 20079), (1164, 17733), (1542, 13386), (1746, 11822), (2231, 9252), (2313, 8924), (3084, 6693), (3492, 5911), (4462, 4626)]