21256245

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{281}}^1$

素因数の和:374

約数の個数: 36

約数和(自身を含む): 37899108

約数和(自身を除く): 16642863

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 281, 369, 615, 843, 1405, 1681, 1845, 2529, 4215, 5043, 8405, 11521, 12645, 15129, 25215, 34563, 57605, 75645, 103689, 172815, 472361, 518445, 1417083, 2361805, 4251249, 7085415, 21256245]

約数ペア:

[(1, 21256245), (3, 7085415), (5, 4251249), (9, 2361805), (15, 1417083), (41, 518445), (45, 472361), (123, 172815), (205, 103689), (281, 75645), (369, 57605), (615, 34563), (843, 25215), (1405, 15129), (1681, 12645), (1845, 11521), (2529, 8405), (4215, 5043)]