19871420

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{10243}}^1$

素因数の和:10349

約数の個数: 24

約数和(自身を含む): 42164304

約数和(自身を除く): 22292884

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 10243, 20486, 40972, 51215, 102430, 204860, 993571, 1987142, 3974284, 4967855, 9935710, 19871420]

約数ペア:

[(1, 19871420), (2, 9935710), (4, 4967855), (5, 3974284), (10, 1987142), (20, 993571), (97, 204860), (194, 102430), (388, 51215), (485, 40972), (970, 20486), (1940, 10243)]