30251980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{691}}^1$

素因数の和:910

約数の個数: 48

約数和(自身を含む): 69753600

約数和(自身を除く): 39501620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 691, 796, 995, 1382, 1990, 2189, 2764, 3455, 3980, 4378, 6910, 7601, 8756, 10945, 13820, 15202, 21890, 30404, 38005, 43780, 76010, 137509, 152020, 275018, 550036, 687545, 1375090, 1512599, 2750180, 3025198, 6050396, 7562995, 15125990, 30251980]

約数ペア:

[(1, 30251980), (2, 15125990), (4, 7562995), (5, 6050396), (10, 3025198), (11, 2750180), (20, 1512599), (22, 1375090), (44, 687545), (55, 550036), (110, 275018), (199, 152020), (220, 137509), (398, 76010), (691, 43780), (796, 38005), (995, 30404), (1382, 21890), (1990, 15202), (2189, 13820), (2764, 10945), (3455, 8756), (3980, 7601), (4378, 6910)]