21205977

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{503}}^1$

素因数の和:589

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 11308071

約数列:

[1, 3, 13, 23, 39, 47, 69, 141, 299, 503, 611, 897, 1081, 1509, 1833, 3243, 6539, 11569, 14053, 19617, 23641, 34707, 42159, 70923, 150397, 307333, 451191, 543743, 921999, 1631229, 7068659, 21205977]

約数ペア:

[(1, 21205977), (3, 7068659), (13, 1631229), (23, 921999), (39, 543743), (47, 451191), (69, 307333), (141, 150397), (299, 70923), (503, 42159), (611, 34707), (897, 23641), (1081, 19617), (1509, 14053), (1833, 11569), (3243, 6539)]