19989530

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{7901}}^1$

素因数の和:7942

約数の個数: 32

約数和(自身を含む): 40963968

約数和(自身を除く): 20974438

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 230, 253, 506, 1265, 2530, 7901, 15802, 39505, 79010, 86911, 173822, 181723, 363446, 434555, 869110, 908615, 1817230, 1998953, 3997906, 9994765, 19989530]

約数ペア:

[(1, 19989530), (2, 9994765), (5, 3997906), (10, 1998953), (11, 1817230), (22, 908615), (23, 869110), (46, 434555), (55, 363446), (110, 181723), (115, 173822), (230, 86911), (253, 79010), (506, 39505), (1265, 15802), (2530, 7901)]