19781839

素因数分解:

$7^5\times {\mathrm{11}}^1\times {\mathrm{107}}^1$

素因数の和:153

約数の個数: 24

約数和(自身を含む): 25411968

約数和(自身を除く): 5630129

約数列:

[1, 7, 11, 49, 77, 107, 343, 539, 749, 1177, 2401, 3773, 5243, 8239, 16807, 26411, 36701, 57673, 184877, 256907, 403711, 1798349, 2825977, 19781839]

約数ペア:

[(1, 19781839), (7, 2825977), (11, 1798349), (49, 403711), (77, 256907), (107, 184877), (343, 57673), (539, 36701), (749, 26411), (1177, 16807), (2401, 8239), (3773, 5243)]