20400357

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{569}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 31190400

約数和(自身を除く): 10790043

約数列:

[1, 3, 17, 19, 37, 51, 57, 111, 323, 569, 629, 703, 969, 1707, 1887, 2109, 9673, 10811, 11951, 21053, 29019, 32433, 35853, 63159, 183787, 357901, 400007, 551361, 1073703, 1200021, 6800119, 20400357]

約数ペア:

[(1, 20400357), (3, 6800119), (17, 1200021), (19, 1073703), (37, 551361), (51, 400007), (57, 357901), (111, 183787), (323, 63159), (569, 35853), (629, 32433), (703, 29019), (969, 21053), (1707, 11951), (1887, 10811), (2109, 9673)]