19865488

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{647}}^1$

素因数の和:775

約数の個数: 40

約数和(自身を含む): 40979520

約数和(自身を除く): 21114032

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 101, 152, 202, 304, 404, 647, 808, 1294, 1616, 1919, 2588, 3838, 5176, 7676, 10352, 12293, 15352, 24586, 30704, 49172, 65347, 98344, 130694, 196688, 261388, 522776, 1045552, 1241593, 2483186, 4966372, 9932744, 19865488]

約数ペア:

[(1, 19865488), (2, 9932744), (4, 4966372), (8, 2483186), (16, 1241593), (19, 1045552), (38, 522776), (76, 261388), (101, 196688), (152, 130694), (202, 98344), (304, 65347), (404, 49172), (647, 30704), (808, 24586), (1294, 15352), (1616, 12293), (1919, 10352), (2588, 7676), (3838, 5176)]