21680890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{761}}^1$

素因数の和:823

約数の個数: 64

約数和(自身を含む): 50035968

約数和(自身を除く): 28355078

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 37, 55, 70, 74, 77, 110, 154, 185, 259, 370, 385, 407, 518, 761, 770, 814, 1295, 1522, 2035, 2590, 2849, 3805, 4070, 5327, 5698, 7610, 8371, 10654, 14245, 16742, 26635, 28157, 28490, 41855, 53270, 56314, 58597, 83710, 117194, 140785, 197099, 281570, 292985, 309727, 394198, 585970, 619454, 985495, 1548635, 1970990, 2168089, 3097270, 4336178, 10840445, 21680890]

約数ペア:

[(1, 21680890), (2, 10840445), (5, 4336178), (7, 3097270), (10, 2168089), (11, 1970990), (14, 1548635), (22, 985495), (35, 619454), (37, 585970), (55, 394198), (70, 309727), (74, 292985), (77, 281570), (110, 197099), (154, 140785), (185, 117194), (259, 83710), (370, 58597), (385, 56314), (407, 53270), (518, 41855), (761, 28490), (770, 28157), (814, 26635), (1295, 16742), (1522, 14245), (2035, 10654), (2590, 8371), (2849, 7610), (3805, 5698), (4070, 5327)]