217403775

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{439}}^1$

素因数の和:557

約数の個数: 72

約数和(自身を含む): 408545280

約数和(自身を除く): 191141505

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 71, 75, 93, 155, 213, 225, 279, 355, 439, 465, 639, 775, 1065, 1317, 1395, 1775, 2195, 2201, 2325, 3195, 3951, 5325, 6585, 6603, 6975, 10975, 11005, 13609, 15975, 19755, 19809, 31169, 32925, 33015, 40827, 55025, 68045, 93507, 98775, 99045, 122481, 155845, 165075, 204135, 280521, 340225, 467535, 495225, 612405, 779225, 966239, 1020675, 1402605, 2337675, 2898717, 3062025, 4831195, 7013025, 8696151, 14493585, 24155975, 43480755, 72467925, 217403775]

約数ペア:

[(1, 217403775), (3, 72467925), (5, 43480755), (9, 24155975), (15, 14493585), (25, 8696151), (31, 7013025), (45, 4831195), (71, 3062025), (75, 2898717), (93, 2337675), (155, 1402605), (213, 1020675), (225, 966239), (279, 779225), (355, 612405), (439, 495225), (465, 467535), (639, 340225), (775, 280521), (1065, 204135), (1317, 165075), (1395, 155845), (1775, 122481), (2195, 99045), (2201, 98775), (2325, 93507), (3195, 68045), (3951, 55025), (5325, 40827), (6585, 33015), (6603, 32925), (6975, 31169), (10975, 19809), (11005, 19755), (13609, 15975)]