21180231

素因数分解:

$3^3\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:141

約数の個数: 48

約数和(自身を含む): 34564320

約数和(自身を除く): 13384089

約数列:

[1, 3, 9, 19, 27, 41, 53, 57, 123, 159, 171, 361, 369, 477, 513, 779, 1007, 1083, 1107, 1431, 2173, 2337, 3021, 3249, 6519, 7011, 9063, 9747, 14801, 19133, 19557, 21033, 27189, 41287, 44403, 57399, 58671, 123861, 133209, 172197, 371583, 399627, 516591, 784453, 1114749, 2353359, 7060077, 21180231]

約数ペア:

[(1, 21180231), (3, 7060077), (9, 2353359), (19, 1114749), (27, 784453), (41, 516591), (53, 399627), (57, 371583), (123, 172197), (159, 133209), (171, 123861), (361, 58671), (369, 57399), (477, 44403), (513, 41287), (779, 27189), (1007, 21033), (1083, 19557), (1107, 19133), (1431, 14801), (2173, 9747), (2337, 9063), (3021, 7011), (3249, 6519)]