21087130

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{68023}}^1$

素因数の和:68061

約数の個数: 16

約数和(自身を含む): 39181824

約数和(自身を除く): 18094694

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 68023, 136046, 340115, 680230, 2108713, 4217426, 10543565, 21087130]

約数ペア:

[(1, 21087130), (2, 10543565), (5, 4217426), (10, 2108713), (31, 680230), (62, 340115), (155, 136046), (310, 68023)]