21661563

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1187}}^1$

素因数の和:1287

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 14833797

約数列:

[1, 3, 7, 11, 21, 33, 77, 79, 231, 237, 553, 869, 1187, 1659, 2607, 3561, 6083, 8309, 13057, 18249, 24927, 39171, 91399, 93773, 274197, 281319, 656411, 1031503, 1969233, 3094509, 7220521, 21661563]

約数ペア:

[(1, 21661563), (3, 7220521), (7, 3094509), (11, 1969233), (21, 1031503), (33, 656411), (77, 281319), (79, 274197), (231, 93773), (237, 91399), (553, 39171), (869, 24927), (1187, 18249), (1659, 13057), (2607, 8309), (3561, 6083)]