721791

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1$

素因数の和:105

約数の個数: 40

約数和(自身を含む): 1316480

約数和(自身を除く): 594689

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 67, 81, 133, 171, 189, 201, 399, 469, 513, 567, 603, 1197, 1273, 1407, 1539, 1809, 3591, 3819, 4221, 5427, 8911, 10773, 11457, 12663, 26733, 34371, 37989, 80199, 103113, 240597, 721791]

約数ペア:

[(1, 721791), (3, 240597), (7, 103113), (9, 80199), (19, 37989), (21, 34371), (27, 26733), (57, 12663), (63, 11457), (67, 10773), (81, 8911), (133, 5427), (171, 4221), (189, 3819), (201, 3591), (399, 1809), (469, 1539), (513, 1407), (567, 1273), (603, 1197)]