21647990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23789}}^1$

素因数の和:23816

約数の個数: 32

約数和(自身を含む): 47960640

約数和(自身を除く): 26312650

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 182, 455, 910, 23789, 47578, 118945, 166523, 237890, 309257, 333046, 618514, 832615, 1546285, 1665230, 2164799, 3092570, 4329598, 10823995, 21647990]

約数ペア:

[(1, 21647990), (2, 10823995), (5, 4329598), (7, 3092570), (10, 2164799), (13, 1665230), (14, 1546285), (26, 832615), (35, 618514), (65, 333046), (70, 309257), (91, 237890), (130, 166523), (182, 118945), (455, 47578), (910, 23789)]