21281900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{487}}^1$

素因数の和:543

約数の個数: 72

約数和(自身を含む): 50830080

約数和(自身を除く): 29548180

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 25, 38, 46, 50, 76, 92, 95, 100, 115, 190, 230, 380, 437, 460, 475, 487, 575, 874, 950, 974, 1150, 1748, 1900, 1948, 2185, 2300, 2435, 4370, 4870, 8740, 9253, 9740, 10925, 11201, 12175, 18506, 21850, 22402, 24350, 37012, 43700, 44804, 46265, 48700, 56005, 92530, 112010, 185060, 212819, 224020, 231325, 280025, 425638, 462650, 560050, 851276, 925300, 1064095, 1120100, 2128190, 4256380, 5320475, 10640950, 21281900]

約数ペア:

[(1, 21281900), (2, 10640950), (4, 5320475), (5, 4256380), (10, 2128190), (19, 1120100), (20, 1064095), (23, 925300), (25, 851276), (38, 560050), (46, 462650), (50, 425638), (76, 280025), (92, 231325), (95, 224020), (100, 212819), (115, 185060), (190, 112010), (230, 92530), (380, 56005), (437, 48700), (460, 46265), (475, 44804), (487, 43700), (575, 37012), (874, 24350), (950, 22402), (974, 21850), (1150, 18506), (1748, 12175), (1900, 11201), (1948, 10925), (2185, 9740), (2300, 9253), (2435, 8740), (4370, 4870)]