19489744

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1051}}^1$

素因数の和:1139

約数の個数: 40

約数和(自身を含む): 40438880

約数和(自身を除く): 20949136

約数列:

[1, 2, 4, 8, 16, 19, 38, 61, 76, 122, 152, 244, 304, 488, 976, 1051, 1159, 2102, 2318, 4204, 4636, 8408, 9272, 16816, 18544, 19969, 39938, 64111, 79876, 128222, 159752, 256444, 319504, 512888, 1025776, 1218109, 2436218, 4872436, 9744872, 19489744]

約数ペア:

[(1, 19489744), (2, 9744872), (4, 4872436), (8, 2436218), (16, 1218109), (19, 1025776), (38, 512888), (61, 319504), (76, 256444), (122, 159752), (152, 128222), (244, 79876), (304, 64111), (488, 39938), (976, 19969), (1051, 18544), (1159, 16816), (2102, 9272), (2318, 8408), (4204, 4636)]