21500365

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{449}}^1$

素因数の和:672

約数の個数: 16

約数和(自身を含む): 26449200

約数和(自身を除く): 4948835

約数列:

[1, 5, 61, 157, 305, 449, 785, 2245, 9577, 27389, 47885, 70493, 136945, 352465, 4300073, 21500365]

約数ペア:

[(1, 21500365), (5, 4300073), (61, 352465), (157, 136945), (305, 70493), (449, 47885), (785, 27389), (2245, 9577)]