19815957

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{2111}}^1$

素因数の和:2273

約数の個数: 24

約数和(自身を含む): 32947200

約数和(自身を除く): 13131243

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 2111, 3129, 6333, 9387, 14777, 18999, 44331, 132993, 314539, 943617, 2201773, 2830851, 6605319, 19815957]

約数ペア:

[(1, 19815957), (3, 6605319), (7, 2830851), (9, 2201773), (21, 943617), (63, 314539), (149, 132993), (447, 44331), (1043, 18999), (1341, 14777), (2111, 9387), (3129, 6333)]