20744775

素因数分解:

$3^3\times 5^2\times {\mathrm{73}}^1\times {\mathrm{421}}^1$

素因数の和:513

約数の個数: 48

約数和(自身を含む): 38722720

約数和(自身を除く): 17977945

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 73, 75, 135, 219, 225, 365, 421, 657, 675, 1095, 1263, 1825, 1971, 2105, 3285, 3789, 5475, 6315, 9855, 10525, 11367, 16425, 18945, 30733, 31575, 49275, 56835, 92199, 94725, 153665, 276597, 284175, 460995, 768325, 829791, 1382985, 2304975, 4148955, 6914925, 20744775]

約数ペア:

[(1, 20744775), (3, 6914925), (5, 4148955), (9, 2304975), (15, 1382985), (25, 829791), (27, 768325), (45, 460995), (73, 284175), (75, 276597), (135, 153665), (219, 94725), (225, 92199), (365, 56835), (421, 49275), (657, 31575), (675, 30733), (1095, 18945), (1263, 16425), (1825, 11367), (1971, 10525), (2105, 9855), (3285, 6315), (3789, 5475)]