21278492

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{79}}^1\times {\mathrm{233}}^1$

素因数の和:350

約数の個数: 36

約数和(自身を含む): 40229280

約数和(自身を除く): 18950788

約数列:

[1, 2, 4, 17, 34, 68, 79, 158, 233, 289, 316, 466, 578, 932, 1156, 1343, 2686, 3961, 5372, 7922, 15844, 18407, 22831, 36814, 45662, 67337, 73628, 91324, 134674, 269348, 312919, 625838, 1251676, 5319623, 10639246, 21278492]

約数ペア:

[(1, 21278492), (2, 10639246), (4, 5319623), (17, 1251676), (34, 625838), (68, 312919), (79, 269348), (158, 134674), (233, 91324), (289, 73628), (316, 67337), (466, 45662), (578, 36814), (932, 22831), (1156, 18407), (1343, 15844), (2686, 7922), (3961, 5372)]