19875919

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{577}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 25038960

約数和(自身を除く): 5163041

約数列:

[1, 7, 19, 37, 49, 133, 259, 577, 703, 931, 1813, 4039, 4921, 10963, 21349, 28273, 34447, 76741, 149443, 405631, 537187, 1046101, 2839417, 19875919]

約数ペア:

[(1, 19875919), (7, 2839417), (19, 1046101), (37, 537187), (49, 405631), (133, 149443), (259, 76741), (577, 34447), (703, 28273), (931, 21349), (1813, 10963), (4039, 4921)]