19901398

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1013}}^1$

素因数の和:1092

約数の個数: 32

約数和(自身を含む): 35043840

約数和(自身を除く): 15142442

約数列:

[1, 2, 11, 19, 22, 38, 47, 94, 209, 418, 517, 893, 1013, 1034, 1786, 2026, 9823, 11143, 19247, 19646, 22286, 38494, 47611, 95222, 211717, 423434, 523721, 904609, 1047442, 1809218, 9950699, 19901398]

約数ペア:

[(1, 19901398), (2, 9950699), (11, 1809218), (19, 1047442), (22, 904609), (38, 523721), (47, 423434), (94, 211717), (209, 95222), (418, 47611), (517, 38494), (893, 22286), (1013, 19646), (1034, 19247), (1786, 11143), (2026, 9823)]