21742047

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{307}}^1$

素因数の和:420

約数の個数: 32

約数和(自身を含む): 33608960

約数和(自身を除く): 11866913

約数列:

[1, 3, 9, 27, 43, 61, 129, 183, 307, 387, 549, 921, 1161, 1647, 2623, 2763, 7869, 8289, 13201, 18727, 23607, 39603, 56181, 70821, 118809, 168543, 356427, 505629, 805261, 2415783, 7247349, 21742047]

約数ペア:

[(1, 21742047), (3, 7247349), (9, 2415783), (27, 805261), (43, 505629), (61, 356427), (129, 168543), (183, 118809), (307, 70821), (387, 56181), (549, 39603), (921, 23607), (1161, 18727), (1647, 13201), (2623, 8289), (2763, 7869)]