12557840

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1987}}^1$

素因数の和:2079

約数の個数: 40

約数和(自身を含む): 29581440

約数和(自身を除く): 17023600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 1987, 3160, 3974, 6320, 7948, 9935, 15896, 19870, 31792, 39740, 79480, 156973, 158960, 313946, 627892, 784865, 1255784, 1569730, 2511568, 3139460, 6278920, 12557840]

約数ペア:

[(1, 12557840), (2, 6278920), (4, 3139460), (5, 2511568), (8, 1569730), (10, 1255784), (16, 784865), (20, 627892), (40, 313946), (79, 158960), (80, 156973), (158, 79480), (316, 39740), (395, 31792), (632, 19870), (790, 15896), (1264, 9935), (1580, 7948), (1987, 6320), (3160, 3974)]