19977800

素因数分解:

$2^3\times 5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:183

約数の個数: 96

約数和(自身を含む): 50086080

約数和(自身を除く): 30108280

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 25, 40, 43, 46, 50, 86, 92, 100, 101, 115, 172, 184, 200, 202, 215, 230, 344, 404, 430, 460, 505, 575, 808, 860, 920, 989, 1010, 1075, 1150, 1720, 1978, 2020, 2150, 2300, 2323, 2525, 3956, 4040, 4300, 4343, 4600, 4646, 4945, 5050, 7912, 8600, 8686, 9292, 9890, 10100, 11615, 17372, 18584, 19780, 20200, 21715, 23230, 24725, 34744, 39560, 43430, 46460, 49450, 58075, 86860, 92920, 98900, 99889, 108575, 116150, 173720, 197800, 199778, 217150, 232300, 399556, 434300, 464600, 499445, 799112, 868600, 998890, 1997780, 2497225, 3995560, 4994450, 9988900, 19977800]

約数ペア:

[(1, 19977800), (2, 9988900), (4, 4994450), (5, 3995560), (8, 2497225), (10, 1997780), (20, 998890), (23, 868600), (25, 799112), (40, 499445), (43, 464600), (46, 434300), (50, 399556), (86, 232300), (92, 217150), (100, 199778), (101, 197800), (115, 173720), (172, 116150), (184, 108575), (200, 99889), (202, 98900), (215, 92920), (230, 86860), (344, 58075), (404, 49450), (430, 46460), (460, 43430), (505, 39560), (575, 34744), (808, 24725), (860, 23230), (920, 21715), (989, 20200), (1010, 19780), (1075, 18584), (1150, 17372), (1720, 11615), (1978, 10100), (2020, 9890), (2150, 9292), (2300, 8686), (2323, 8600), (2525, 7912), (3956, 5050), (4040, 4945), (4300, 4646), (4343, 4600)]