20980575

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{173}}^1$

素因数の和:214

約数の個数: 108

約数和(自身を含む): 47963448

約数和(自身を除く): 26982873

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 33, 35, 45, 49, 55, 63, 75, 77, 99, 105, 147, 165, 173, 175, 225, 231, 245, 275, 315, 385, 441, 495, 519, 525, 539, 693, 735, 825, 865, 1155, 1211, 1225, 1557, 1575, 1617, 1903, 1925, 2205, 2475, 2595, 2695, 3465, 3633, 3675, 4325, 4851, 5709, 5775, 6055, 7785, 8085, 8477, 9515, 10899, 11025, 12975, 13321, 13475, 17127, 17325, 18165, 24255, 25431, 28545, 30275, 38925, 39963, 40425, 42385, 47575, 54495, 66605, 76293, 85635, 90825, 93247, 119889, 121275, 127155, 142725, 199815, 211925, 272475, 279741, 333025, 381465, 428175, 466235, 599445, 635775, 839223, 999075, 1398705, 1907325, 2331175, 2997225, 4196115, 6993525, 20980575]

約数ペア:

[(1, 20980575), (3, 6993525), (5, 4196115), (7, 2997225), (9, 2331175), (11, 1907325), (15, 1398705), (21, 999075), (25, 839223), (33, 635775), (35, 599445), (45, 466235), (49, 428175), (55, 381465), (63, 333025), (75, 279741), (77, 272475), (99, 211925), (105, 199815), (147, 142725), (165, 127155), (173, 121275), (175, 119889), (225, 93247), (231, 90825), (245, 85635), (275, 76293), (315, 66605), (385, 54495), (441, 47575), (495, 42385), (519, 40425), (525, 39963), (539, 38925), (693, 30275), (735, 28545), (825, 25431), (865, 24255), (1155, 18165), (1211, 17325), (1225, 17127), (1557, 13475), (1575, 13321), (1617, 12975), (1903, 11025), (1925, 10899), (2205, 9515), (2475, 8477), (2595, 8085), (2695, 7785), (3465, 6055), (3633, 5775), (3675, 5709), (4325, 4851)]