21395990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{751}}^1$

素因数の和:813

約数の個数: 64

約数和(自身を含む): 49379328

約数和(自身を除く): 27983338

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, 751, 770, 814, 1295, 1502, 2035, 2590, 2849, 3755, 4070, 5257, 5698, 7510, 8261, 10514, 14245, 16522, 26285, 27787, 28490, 41305, 52570, 55574, 57827, 82610, 115654, 138935, 194509, 277870, 289135, 305657, 389018, 578270, 611314, 972545, 1528285, 1945090, 2139599, 3056570, 4279198, 10697995, 21395990]

約数ペア:

[(1, 21395990), (2, 10697995), (5, 4279198), (7, 3056570), (10, 2139599), (11, 1945090), (14, 1528285), (22, 972545), (35, 611314), (37, 578270), (55, 389018), (70, 305657), (74, 289135), (77, 277870), (110, 194509), (154, 138935), (185, 115654), (259, 82610), (370, 57827), (385, 55574), (407, 52570), (518, 41305), (751, 28490), (770, 27787), (814, 26285), (1295, 16522), (1502, 14245), (2035, 10514), (2590, 8261), (2849, 7510), (3755, 5698), (4070, 5257)]