21980738

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{313}}^1$

素因数の和:438

約数の個数: 32

約数和(自身を含む): 37084656

約数和(自身を除く): 15103918

約数列:

[1, 2, 13, 26, 37, 73, 74, 146, 313, 481, 626, 949, 962, 1898, 2701, 4069, 5402, 8138, 11581, 22849, 23162, 35113, 45698, 70226, 150553, 297037, 301106, 594074, 845413, 1690826, 10990369, 21980738]

約数ペア:

[(1, 21980738), (2, 10990369), (13, 1690826), (26, 845413), (37, 594074), (73, 301106), (74, 297037), (146, 150553), (313, 70226), (481, 45698), (626, 35113), (949, 23162), (962, 22849), (1898, 11581), (2701, 8138), (4069, 5402)]