21688065

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2221}}^1$

素因数の和:2270

約数の個数: 48

約数和(自身を含む): 44368896

約数和(自身を除く): 22680831

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 93, 105, 155, 217, 279, 315, 465, 651, 1085, 1395, 1953, 2221, 3255, 6663, 9765, 11105, 15547, 19989, 33315, 46641, 68851, 77735, 99945, 139923, 206553, 233205, 344255, 481957, 619659, 699615, 1032765, 1445871, 2409785, 3098295, 4337613, 7229355, 21688065]

約数ペア:

[(1, 21688065), (3, 7229355), (5, 4337613), (7, 3098295), (9, 2409785), (15, 1445871), (21, 1032765), (31, 699615), (35, 619659), (45, 481957), (63, 344255), (93, 233205), (105, 206553), (155, 139923), (217, 99945), (279, 77735), (315, 68851), (465, 46641), (651, 33315), (1085, 19989), (1395, 15547), (1953, 11105), (2221, 9765), (3255, 6663)]