201720855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{379}}^1$

素因数の和:568

約数の個数: 64

約数和(自身を含む): 382602240

約数和(自身を除く): 180881385

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 137, 185, 259, 379, 411, 555, 685, 777, 959, 1137, 1295, 1895, 2055, 2653, 2877, 3885, 4795, 5069, 5685, 7959, 13265, 14023, 14385, 15207, 25345, 35483, 39795, 42069, 51923, 70115, 76035, 98161, 106449, 155769, 177415, 210345, 259615, 294483, 363461, 490805, 532245, 778845, 1090383, 1472415, 1817305, 1921151, 5451915, 5763453, 9605755, 13448057, 28817265, 40344171, 67240285, 201720855]

約数ペア:

[(1, 201720855), (3, 67240285), (5, 40344171), (7, 28817265), (15, 13448057), (21, 9605755), (35, 5763453), (37, 5451915), (105, 1921151), (111, 1817305), (137, 1472415), (185, 1090383), (259, 778845), (379, 532245), (411, 490805), (555, 363461), (685, 294483), (777, 259615), (959, 210345), (1137, 177415), (1295, 155769), (1895, 106449), (2055, 98161), (2653, 76035), (2877, 70115), (3885, 51923), (4795, 42069), (5069, 39795), (5685, 35483), (7959, 25345), (13265, 15207), (14023, 14385)]