21104811

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{353}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 38141376

約数和(自身を除く): 17036565

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 73, 91, 117, 219, 273, 353, 511, 657, 819, 949, 1059, 1533, 2471, 2847, 3177, 4589, 4599, 6643, 7413, 8541, 13767, 19929, 22239, 25769, 32123, 41301, 59787, 77307, 96369, 180383, 231921, 289107, 334997, 541149, 1004991, 1623447, 2344979, 3014973, 7034937, 21104811]

約数ペア:

[(1, 21104811), (3, 7034937), (7, 3014973), (9, 2344979), (13, 1623447), (21, 1004991), (39, 541149), (63, 334997), (73, 289107), (91, 231921), (117, 180383), (219, 96369), (273, 77307), (353, 59787), (511, 41301), (657, 32123), (819, 25769), (949, 22239), (1059, 19929), (1533, 13767), (2471, 8541), (2847, 7413), (3177, 6643), (4589, 4599)]