257222810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{769}}^1$

素因数の和:903

約数の個数: 64

約数和(自身を含む): 521579520

約数和(自身を除く): 264356710

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 83, 130, 155, 166, 310, 403, 415, 769, 806, 830, 1079, 1538, 2015, 2158, 2573, 3845, 4030, 5146, 5395, 7690, 9997, 10790, 12865, 19994, 23839, 25730, 33449, 47678, 49985, 63827, 66898, 99970, 119195, 127654, 167245, 238390, 309907, 319135, 334490, 619814, 638270, 829751, 1549535, 1659502, 1978637, 3099070, 3957274, 4148755, 8297510, 9893185, 19786370, 25722281, 51444562, 128611405, 257222810]

約数ペア:

[(1, 257222810), (2, 128611405), (5, 51444562), (10, 25722281), (13, 19786370), (26, 9893185), (31, 8297510), (62, 4148755), (65, 3957274), (83, 3099070), (130, 1978637), (155, 1659502), (166, 1549535), (310, 829751), (403, 638270), (415, 619814), (769, 334490), (806, 319135), (830, 309907), (1079, 238390), (1538, 167245), (2015, 127654), (2158, 119195), (2573, 99970), (3845, 66898), (4030, 63827), (5146, 49985), (5395, 47678), (7690, 33449), (9997, 25730), (10790, 23839), (12865, 19994)]