21606021

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:271

約数の個数: 40

約数和(自身を含む): 34557600

約数和(自身を除く): 12951579

約数列:

[1, 3, 9, 19, 27, 57, 81, 101, 139, 171, 303, 417, 513, 909, 1251, 1539, 1919, 2641, 2727, 3753, 5757, 7923, 8181, 11259, 14039, 17271, 23769, 42117, 51813, 71307, 126351, 155439, 213921, 266741, 379053, 800223, 1137159, 2400669, 7202007, 21606021]

約数ペア:

[(1, 21606021), (3, 7202007), (9, 2400669), (19, 1137159), (27, 800223), (57, 379053), (81, 266741), (101, 213921), (139, 155439), (171, 126351), (303, 71307), (417, 51813), (513, 42117), (909, 23769), (1251, 17271), (1539, 14039), (1919, 11259), (2641, 8181), (2727, 7923), (3753, 5757)]