21740145

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6679}}^1$

素因数の和:6725

約数の個数: 32

約数和(自身を含む): 41041920

約数和(自身を除く): 19301775

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6679, 20037, 33395, 46753, 100185, 140259, 207049, 233765, 621147, 701295, 1035245, 1449343, 3105735, 4348029, 7246715, 21740145]

約数ペア:

[(1, 21740145), (3, 7246715), (5, 4348029), (7, 3105735), (15, 1449343), (21, 1035245), (31, 701295), (35, 621147), (93, 233765), (105, 207049), (155, 140259), (217, 100185), (465, 46753), (651, 33395), (1085, 20037), (3255, 6679)]