19991591

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{367}}^1$

素因数の和:494

約数の個数: 16

約数和(自身を含む): 21903360

約数和(自身を除く): 1911769

約数列:

[1, 19, 47, 61, 367, 893, 1159, 2867, 6973, 17249, 22387, 54473, 327731, 425353, 1052189, 19991591]

約数ペア:

[(1, 19991591), (19, 1052189), (47, 425353), (61, 327731), (367, 54473), (893, 22387), (1159, 17249), (2867, 6973)]