21190520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40751}}^1$

素因数の和:40775

約数の個数: 32

約数和(自身を含む): 51347520

約数和(自身を除く): 30157000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40751, 81502, 163004, 203755, 326008, 407510, 529763, 815020, 1059526, 1630040, 2119052, 2648815, 4238104, 5297630, 10595260, 21190520]

約数ペア:

[(1, 21190520), (2, 10595260), (4, 5297630), (5, 4238104), (8, 2648815), (10, 2119052), (13, 1630040), (20, 1059526), (26, 815020), (40, 529763), (52, 407510), (65, 326008), (104, 203755), (130, 163004), (260, 81502), (520, 40751)]