20853855

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:210

約数の個数: 80

約数和(自身を含む): 42375168

約数和(自身を除く): 21521313

約数列:

[1, 3, 5, 9, 11, 15, 27, 31, 33, 45, 55, 81, 93, 99, 135, 151, 155, 165, 279, 297, 341, 405, 453, 465, 495, 755, 837, 891, 1023, 1359, 1395, 1485, 1661, 1705, 2265, 2511, 3069, 4077, 4185, 4455, 4681, 4983, 5115, 6795, 8305, 9207, 12231, 12555, 14043, 14949, 15345, 20385, 23405, 24915, 27621, 42129, 44847, 46035, 51491, 61155, 70215, 74745, 126387, 134541, 138105, 154473, 210645, 224235, 257455, 379161, 463419, 631935, 672705, 772365, 1390257, 1895805, 2317095, 4170771, 6951285, 20853855]

約数ペア:

[(1, 20853855), (3, 6951285), (5, 4170771), (9, 2317095), (11, 1895805), (15, 1390257), (27, 772365), (31, 672705), (33, 631935), (45, 463419), (55, 379161), (81, 257455), (93, 224235), (99, 210645), (135, 154473), (151, 138105), (155, 134541), (165, 126387), (279, 74745), (297, 70215), (341, 61155), (405, 51491), (453, 46035), (465, 44847), (495, 42129), (755, 27621), (837, 24915), (891, 23405), (1023, 20385), (1359, 15345), (1395, 14949), (1485, 14043), (1661, 12555), (1705, 12231), (2265, 9207), (2511, 8305), (3069, 6795), (4077, 5115), (4185, 4983), (4455, 4681)]