20192991

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 37094400

約数和(自身を除く): 16901409

約数列:

[1, 3, 7, 13, 17, 19, 21, 39, 51, 57, 91, 119, 133, 221, 229, 247, 273, 323, 357, 399, 663, 687, 741, 969, 1547, 1603, 1729, 2261, 2977, 3893, 4199, 4351, 4641, 4809, 5187, 6783, 8931, 11679, 12597, 13053, 20839, 27251, 29393, 30457, 50609, 56563, 62517, 73967, 81753, 88179, 91371, 151827, 169689, 221901, 354263, 395941, 517769, 961571, 1062789, 1187823, 1553307, 2884713, 6730997, 20192991]

約数ペア:

[(1, 20192991), (3, 6730997), (7, 2884713), (13, 1553307), (17, 1187823), (19, 1062789), (21, 961571), (39, 517769), (51, 395941), (57, 354263), (91, 221901), (119, 169689), (133, 151827), (221, 91371), (229, 88179), (247, 81753), (273, 73967), (323, 62517), (357, 56563), (399, 50609), (663, 30457), (687, 29393), (741, 27251), (969, 20839), (1547, 13053), (1603, 12597), (1729, 11679), (2261, 8931), (2977, 6783), (3893, 5187), (4199, 4809), (4351, 4641)]