21871983

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 14899857

約数列:

[1, 3, 7, 19, 21, 41, 49, 57, 123, 133, 147, 191, 287, 399, 573, 779, 861, 931, 1337, 2009, 2337, 2793, 3629, 4011, 5453, 6027, 7831, 9359, 10887, 16359, 23493, 25403, 28077, 38171, 54817, 76209, 114513, 148789, 164451, 177821, 383719, 446367, 533463, 1041523, 1151157, 3124569, 7290661, 21871983]

約数ペア:

[(1, 21871983), (3, 7290661), (7, 3124569), (19, 1151157), (21, 1041523), (41, 533463), (49, 446367), (57, 383719), (123, 177821), (133, 164451), (147, 148789), (191, 114513), (287, 76209), (399, 54817), (573, 38171), (779, 28077), (861, 25403), (931, 23493), (1337, 16359), (2009, 10887), (2337, 9359), (2793, 7831), (3629, 6027), (4011, 5453)]