20805470

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1$

素因数の和:357

約数の個数: 64

約数和(自身を含む): 45636480

約数和(自身を除く): 24831010

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 37, 58, 70, 74, 145, 185, 203, 259, 277, 290, 370, 406, 518, 554, 1015, 1073, 1295, 1385, 1939, 2030, 2146, 2590, 2770, 3878, 5365, 7511, 8033, 9695, 10249, 10730, 15022, 16066, 19390, 20498, 37555, 40165, 51245, 56231, 71743, 75110, 80330, 102490, 112462, 143486, 281155, 297221, 358715, 562310, 594442, 717430, 1486105, 2080547, 2972210, 4161094, 10402735, 20805470]

約数ペア:

[(1, 20805470), (2, 10402735), (5, 4161094), (7, 2972210), (10, 2080547), (14, 1486105), (29, 717430), (35, 594442), (37, 562310), (58, 358715), (70, 297221), (74, 281155), (145, 143486), (185, 112462), (203, 102490), (259, 80330), (277, 75110), (290, 71743), (370, 56231), (406, 51245), (518, 40165), (554, 37555), (1015, 20498), (1073, 19390), (1295, 16066), (1385, 15022), (1939, 10730), (2030, 10249), (2146, 9695), (2590, 8033), (2770, 7511), (3878, 5365)]