28265860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1999}}^1$

素因数の和:2116

約数の個数: 48

約数和(自身を含む): 68544000

約数和(自身を除く): 40278140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1999, 2020, 2828, 3535, 3998, 7070, 7996, 9995, 13993, 14140, 19990, 27986, 39980, 55972, 69965, 139930, 201899, 279860, 403798, 807596, 1009495, 1413293, 2018990, 2826586, 4037980, 5653172, 7066465, 14132930, 28265860]

約数ペア:

[(1, 28265860), (2, 14132930), (4, 7066465), (5, 5653172), (7, 4037980), (10, 2826586), (14, 2018990), (20, 1413293), (28, 1009495), (35, 807596), (70, 403798), (101, 279860), (140, 201899), (202, 139930), (404, 69965), (505, 55972), (707, 39980), (1010, 27986), (1414, 19990), (1999, 14140), (2020, 13993), (2828, 9995), (3535, 7996), (3998, 7070)]