21971313

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 39544960

約数和(自身を除く): 17573647

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 139, 193, 273, 417, 579, 819, 973, 1251, 1351, 1737, 1807, 2509, 2919, 4053, 5421, 7527, 8757, 12159, 12649, 16263, 17563, 22581, 26827, 37947, 52689, 80481, 113841, 158067, 187789, 241443, 348751, 563367, 1046253, 1690101, 2441257, 3138759, 7323771, 21971313]

約数ペア:

[(1, 21971313), (3, 7323771), (7, 3138759), (9, 2441257), (13, 1690101), (21, 1046253), (39, 563367), (63, 348751), (91, 241443), (117, 187789), (139, 158067), (193, 113841), (273, 80481), (417, 52689), (579, 37947), (819, 26827), (973, 22581), (1251, 17563), (1351, 16263), (1737, 12649), (1807, 12159), (2509, 8757), (2919, 7527), (4053, 5421)]