21146985

素因数分解:

$3^2\times 5^1\times {\mathrm{571}}^1\times {\mathrm{823}}^1$

素因数の和:1405

約数の個数: 24

約数和(自身を含む): 36763584

約数和(自身を除く): 15616599

約数列:

[1, 3, 5, 9, 15, 45, 571, 823, 1713, 2469, 2855, 4115, 5139, 7407, 8565, 12345, 25695, 37035, 469933, 1409799, 2349665, 4229397, 7048995, 21146985]

約数ペア:

[(1, 21146985), (3, 7048995), (5, 4229397), (9, 2349665), (15, 1409799), (45, 469933), (571, 37035), (823, 25695), (1713, 12345), (2469, 8565), (2855, 7407), (4115, 5139)]