19980916

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{4817}}^1$

素因数の和:4899

約数の個数: 24

約数和(自身を含む): 37638216

約数和(自身を除く): 17657300

約数列:

[1, 2, 4, 17, 34, 61, 68, 122, 244, 1037, 2074, 4148, 4817, 9634, 19268, 81889, 163778, 293837, 327556, 587674, 1175348, 4995229, 9990458, 19980916]

約数ペア:

[(1, 19980916), (2, 9990458), (4, 4995229), (17, 1175348), (34, 587674), (61, 327556), (68, 293837), (122, 163778), (244, 81889), (1037, 19268), (2074, 9634), (4148, 4817)]