19951971

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1$

素因数の和:140

約数の個数: 48

約数和(自身を含む): 31622400

約数和(自身を除く): 11670429

約数列:

[1, 3, 13, 23, 29, 39, 59, 69, 87, 169, 177, 299, 377, 507, 667, 767, 897, 1131, 1357, 1711, 2001, 2301, 3887, 4071, 4901, 5133, 8671, 9971, 11661, 14703, 17641, 22243, 26013, 29913, 39353, 52923, 66729, 112723, 118059, 229333, 289159, 338169, 511589, 687999, 867477, 1534767, 6650657, 19951971]

約数ペア:

[(1, 19951971), (3, 6650657), (13, 1534767), (23, 867477), (29, 687999), (39, 511589), (59, 338169), (69, 289159), (87, 229333), (169, 118059), (177, 112723), (299, 66729), (377, 52923), (507, 39353), (667, 29913), (767, 26013), (897, 22243), (1131, 17641), (1357, 14703), (1711, 11661), (2001, 9971), (2301, 8671), (3887, 5133), (4071, 4901)]