21141405

素因数分解:

$3^4\times 5^1\times {\mathrm{52201}}^1$

素因数の和:52218

約数の個数: 20

約数和(自身を含む): 37898652

約数和(自身を除く): 16757247

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52201, 156603, 261005, 469809, 783015, 1409427, 2349045, 4228281, 7047135, 21141405]

約数ペア:

[(1, 21141405), (3, 7047135), (5, 4228281), (9, 2349045), (15, 1409427), (27, 783015), (45, 469809), (81, 261005), (135, 156603), (405, 52201)]