261601420

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{65729}}^1$

素因数の和:65937

約数の個数: 24

約数和(自身を含む): 552132000

約数和(自身を除く): 290530580

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 65729, 131458, 262916, 328645, 657290, 1314580, 13080071, 26160142, 52320284, 65400355, 130800710, 261601420]

約数ペア:

[(1, 261601420), (2, 130800710), (4, 65400355), (5, 52320284), (10, 26160142), (20, 13080071), (199, 1314580), (398, 657290), (796, 328645), (995, 262916), (1990, 131458), (3980, 65729)]