19999868

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{13477}}^1$

素因数の和:13541

約数の個数: 24

約数和(自身を含む): 40757472

約数和(自身を除く): 20757604

約数列:

[1, 2, 4, 7, 14, 28, 53, 106, 212, 371, 742, 1484, 13477, 26954, 53908, 94339, 188678, 377356, 714281, 1428562, 2857124, 4999967, 9999934, 19999868]

約数ペア:

[(1, 19999868), (2, 9999934), (4, 4999967), (7, 2857124), (14, 1428562), (28, 714281), (53, 377356), (106, 188678), (212, 94339), (371, 53908), (742, 26954), (1484, 13477)]