19742672

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{643}}^1$

素因数の和:771

約数の個数: 40

約数和(自身を含む): 40726560

約数和(自身を除く): 20983888

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 101, 152, 202, 304, 404, 643, 808, 1286, 1616, 1919, 2572, 3838, 5144, 7676, 10288, 12217, 15352, 24434, 30704, 48868, 64943, 97736, 129886, 195472, 259772, 519544, 1039088, 1233917, 2467834, 4935668, 9871336, 19742672]

約数ペア:

[(1, 19742672), (2, 9871336), (4, 4935668), (8, 2467834), (16, 1233917), (19, 1039088), (38, 519544), (76, 259772), (101, 195472), (152, 129886), (202, 97736), (304, 64943), (404, 48868), (643, 30704), (808, 24434), (1286, 15352), (1616, 12217), (1919, 10288), (2572, 7676), (3838, 5144)]