20847015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{229}}^1$

素因数の和:281

約数の個数: 72

約数和(自身を含む): 44060640

約数和(自身を除く): 23213625

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 229, 255, 289, 315, 357, 595, 687, 765, 867, 1071, 1145, 1445, 1603, 1785, 2023, 2061, 2601, 3435, 3893, 4335, 4809, 5355, 6069, 8015, 10115, 10305, 11679, 13005, 14427, 18207, 19465, 24045, 27251, 30345, 35037, 58395, 66181, 72135, 81753, 91035, 136255, 175185, 198543, 245259, 330905, 408765, 463267, 595629, 992715, 1226295, 1389801, 2316335, 2978145, 4169403, 6949005, 20847015]

約数ペア:

[(1, 20847015), (3, 6949005), (5, 4169403), (7, 2978145), (9, 2316335), (15, 1389801), (17, 1226295), (21, 992715), (35, 595629), (45, 463267), (51, 408765), (63, 330905), (85, 245259), (105, 198543), (119, 175185), (153, 136255), (229, 91035), (255, 81753), (289, 72135), (315, 66181), (357, 58395), (595, 35037), (687, 30345), (765, 27251), (867, 24045), (1071, 19465), (1145, 18207), (1445, 14427), (1603, 13005), (1785, 11679), (2023, 10305), (2061, 10115), (2601, 8015), (3435, 6069), (3893, 5355), (4335, 4809)]