19906557

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 31664640

約数和(自身を除く): 11758083

約数列:

[1, 3, 11, 29, 31, 33, 61, 87, 93, 121, 183, 319, 341, 363, 671, 899, 957, 1023, 1769, 1891, 2013, 2697, 3509, 3751, 5307, 5673, 7381, 9889, 10527, 11253, 19459, 20801, 22143, 29667, 54839, 58377, 62403, 108779, 164517, 214049, 228811, 326337, 603229, 642147, 686433, 1809687, 6635519, 19906557]

約数ペア:

[(1, 19906557), (3, 6635519), (11, 1809687), (29, 686433), (31, 642147), (33, 603229), (61, 326337), (87, 228811), (93, 214049), (121, 164517), (183, 108779), (319, 62403), (341, 58377), (363, 54839), (671, 29667), (899, 22143), (957, 20801), (1023, 19459), (1769, 11253), (1891, 10527), (2013, 9889), (2697, 7381), (3509, 5673), (3751, 5307)]