21395311

素因数分解:

$7^5\times {\mathrm{19}}^1\times {\mathrm{67}}^1$

素因数の和:121

約数の個数: 24

約数和(自身を含む): 26666880

約数和(自身を除く): 5271569

約数列:

[1, 7, 19, 49, 67, 133, 343, 469, 931, 1273, 2401, 3283, 6517, 8911, 16807, 22981, 45619, 62377, 160867, 319333, 436639, 1126069, 3056473, 21395311]

約数ペア:

[(1, 21395311), (7, 3056473), (19, 1126069), (49, 436639), (67, 319333), (133, 160867), (343, 62377), (469, 45619), (931, 22981), (1273, 16807), (2401, 8911), (3283, 6517)]