19909980245

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{277}}^1\times {\mathrm{359}}^1\times {\mathrm{1741}}^1$

素因数の和:2405

約数の個数: 32

約数和(自身を含む): 25104867840

約数和(自身を除く): 5194887595

約数列:

[1, 5, 23, 115, 277, 359, 1385, 1741, 1795, 6371, 8257, 8705, 31855, 40043, 41285, 99443, 200215, 482257, 497215, 625019, 2287189, 2411285, 3125095, 11091911, 11435945, 14375437, 55459555, 71877185, 173130263, 865651315, 3981996049, 19909980245]

約数ペア:

[(1, 19909980245), (5, 3981996049), (23, 865651315), (115, 173130263), (277, 71877185), (359, 55459555), (1385, 14375437), (1741, 11435945), (1795, 11091911), (6371, 3125095), (8257, 2411285), (8705, 2287189), (31855, 625019), (40043, 497215), (41285, 482257), (99443, 200215)]