19689621

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{7879}}^1$

素因数の和:7913

約数の個数: 24

約数和(自身を含む): 32339520

約数和(自身を除く): 12649899

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 7879, 23637, 55153, 133943, 165459, 386071, 401829, 937601, 1158213, 2812803, 6563207, 19689621]

約数ペア:

[(1, 19689621), (3, 6563207), (7, 2812803), (17, 1158213), (21, 937601), (49, 401829), (51, 386071), (119, 165459), (147, 133943), (357, 55153), (833, 23637), (2499, 7879)]