21687730

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:414

約数の個数: 32

約数和(自身を含む): 39988080

約数和(自身を除く): 18300350

約数列:

[1, 2, 5, 10, 101, 109, 197, 202, 218, 394, 505, 545, 985, 1010, 1090, 1970, 11009, 19897, 21473, 22018, 39794, 42946, 55045, 99485, 107365, 110090, 198970, 214730, 2168773, 4337546, 10843865, 21687730]

約数ペア:

[(1, 21687730), (2, 10843865), (5, 4337546), (10, 2168773), (101, 214730), (109, 198970), (197, 110090), (202, 107365), (218, 99485), (394, 55045), (505, 42946), (545, 39794), (985, 22018), (1010, 21473), (1090, 19897), (1970, 11009)]