21097215

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12671}}^1$

素因数の和:12719

約数の個数: 24

約数和(自身を含む): 37559808

約数和(自身を除く): 16462593

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12671, 38013, 63355, 114039, 190065, 468827, 570195, 1406481, 2344135, 4219443, 7032405, 21097215]

約数ペア:

[(1, 21097215), (3, 7032405), (5, 4219443), (9, 2344135), (15, 1406481), (37, 570195), (45, 468827), (111, 190065), (185, 114039), (333, 63355), (555, 38013), (1665, 12671)]