9988900

素因数分解:

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

素因数の和:181

約数の個数: 72

約数和(自身を含む): 23373504

約数和(自身を除く): 13384604

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 43, 46, 50, 86, 92, 100, 101, 115, 172, 202, 215, 230, 404, 430, 460, 505, 575, 860, 989, 1010, 1075, 1150, 1978, 2020, 2150, 2300, 2323, 2525, 3956, 4300, 4343, 4646, 4945, 5050, 8686, 9292, 9890, 10100, 11615, 17372, 19780, 21715, 23230, 24725, 43430, 46460, 49450, 58075, 86860, 98900, 99889, 108575, 116150, 199778, 217150, 232300, 399556, 434300, 499445, 998890, 1997780, 2497225, 4994450, 9988900]

約数ペア:

[(1, 9988900), (2, 4994450), (4, 2497225), (5, 1997780), (10, 998890), (20, 499445), (23, 434300), (25, 399556), (43, 232300), (46, 217150), (50, 199778), (86, 116150), (92, 108575), (100, 99889), (101, 98900), (115, 86860), (172, 58075), (202, 49450), (215, 46460), (230, 43430), (404, 24725), (430, 23230), (460, 21715), (505, 19780), (575, 17372), (860, 11615), (989, 10100), (1010, 9890), (1075, 9292), (1150, 8686), (1978, 5050), (2020, 4945), (2150, 4646), (2300, 4343), (2323, 4300), (2525, 3956)]