21179950

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1$

素因数の和:517

約数の個数: 48

約数和(自身を含む): 43528464

約数和(自身を除く): 22348514

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 97, 110, 194, 275, 397, 485, 550, 794, 970, 1067, 1985, 2134, 2425, 3970, 4367, 4850, 5335, 8734, 9925, 10670, 19850, 21835, 26675, 38509, 43670, 53350, 77018, 109175, 192545, 218350, 385090, 423599, 847198, 962725, 1925450, 2117995, 4235990, 10589975, 21179950]

約数ペア:

[(1, 21179950), (2, 10589975), (5, 4235990), (10, 2117995), (11, 1925450), (22, 962725), (25, 847198), (50, 423599), (55, 385090), (97, 218350), (110, 192545), (194, 109175), (275, 77018), (397, 53350), (485, 43670), (550, 38509), (794, 26675), (970, 21835), (1067, 19850), (1985, 10670), (2134, 9925), (2425, 8734), (3970, 5335), (4367, 4850)]