21919653

素因数分解:

$3^4\times 7^1\times {\mathrm{67}}^1\times {\mathrm{577}}^1$

素因数の和:663

約数の個数: 40

約数和(自身を含む): 38046272

約数和(自身を除く): 16126619

約数列:

[1, 3, 7, 9, 21, 27, 63, 67, 81, 189, 201, 469, 567, 577, 603, 1407, 1731, 1809, 4039, 4221, 5193, 5427, 12117, 12663, 15579, 36351, 37989, 38659, 46737, 109053, 115977, 270613, 327159, 347931, 811839, 1043793, 2435517, 3131379, 7306551, 21919653]

約数ペア:

[(1, 21919653), (3, 7306551), (7, 3131379), (9, 2435517), (21, 1043793), (27, 811839), (63, 347931), (67, 327159), (81, 270613), (189, 115977), (201, 109053), (469, 46737), (567, 38659), (577, 37989), (603, 36351), (1407, 15579), (1731, 12663), (1809, 12117), (4039, 5427), (4221, 5193)]