20890730

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:335

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 24832150

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 41, 58, 70, 82, 145, 203, 205, 251, 287, 290, 406, 410, 502, 574, 1015, 1189, 1255, 1435, 1757, 2030, 2378, 2510, 2870, 3514, 5945, 7279, 8323, 8785, 10291, 11890, 14558, 16646, 17570, 20582, 36395, 41615, 50953, 51455, 72037, 72790, 83230, 101906, 102910, 144074, 254765, 298439, 360185, 509530, 596878, 720370, 1492195, 2089073, 2984390, 4178146, 10445365, 20890730]

約数ペア:

[(1, 20890730), (2, 10445365), (5, 4178146), (7, 2984390), (10, 2089073), (14, 1492195), (29, 720370), (35, 596878), (41, 509530), (58, 360185), (70, 298439), (82, 254765), (145, 144074), (203, 102910), (205, 101906), (251, 83230), (287, 72790), (290, 72037), (406, 51455), (410, 50953), (502, 41615), (574, 36395), (1015, 20582), (1189, 17570), (1255, 16646), (1435, 14558), (1757, 11890), (2030, 10291), (2378, 8785), (2510, 8323), (2870, 7279), (3514, 5945)]