21000884793

素因数分解:

$3^1\times 7^1\times {\mathrm{1979}}^1\times {\mathrm{505327}}^1$

素因数の和:507316

約数の個数: 16

約数和(自身を含む): 32017582080

約数和(自身を除く): 11016697287

約数列:

[1, 3, 7, 21, 1979, 5937, 13853, 41559, 505327, 1515981, 3537289, 10611867, 1000042133, 3000126399, 7000294931, 21000884793]

約数ペア:

[(1, 21000884793), (3, 7000294931), (7, 3000126399), (21, 1000042133), (1979, 10611867), (5937, 3537289), (13853, 1515981), (41559, 505327)]