1991004057

素因数分解:

$3^4\times 7^1\times {\mathrm{79}}^1\times {\mathrm{44449}}^1$

素因数の和:44547

約数の個数: 40

約数和(自身を含む): 3442208000

約数和(自身を除く): 1451203943

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 189, 237, 553, 567, 711, 1659, 2133, 4977, 6399, 14931, 44449, 44793, 133347, 311143, 400041, 933429, 1200123, 2800287, 3511471, 3600369, 8400861, 10534413, 24580297, 25202583, 31603239, 73740891, 94809717, 221222673, 284429151, 663668019, 1991004057]

約数ペア:

[(1, 1991004057), (3, 663668019), (7, 284429151), (9, 221222673), (21, 94809717), (27, 73740891), (63, 31603239), (79, 25202583), (81, 24580297), (189, 10534413), (237, 8400861), (553, 3600369), (567, 3511471), (711, 2800287), (1659, 1200123), (2133, 933429), (4977, 400041), (6399, 311143), (14931, 133347), (44449, 44793)]