19900.000000

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{409}}^1$

素因数の和:441

約数の個数: 24

約数和(自身を含む): 619920

約数和(自身を除く): 313988

約数列:

[1, 2, 4, 11, 17, 22, 34, 44, 68, 187, 374, 409, 748, 818, 1636, 4499, 6953, 8998, 13906, 17996, 27812, 76483, 152966, 305932]

約数ペア:

[(1, 305932), (2, 152966), (4, 76483), (11, 27812), (17, 17996), (22, 13906), (34, 8998), (44, 6953), (68, 4499), (187, 1636), (374, 818), (409, 748)]