20821725

素因数分解:

$3^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{283}}^1$

素因数の和:411

約数の個数: 48

約数和(自身を含む): 38737600

約数和(自身を除く): 17915875

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 109, 135, 225, 283, 327, 545, 675, 849, 981, 1415, 1635, 2547, 2725, 2943, 4245, 4905, 7075, 7641, 8175, 12735, 14715, 21225, 24525, 30847, 38205, 63675, 73575, 92541, 154235, 191025, 277623, 462705, 771175, 832869, 1388115, 2313525, 4164345, 6940575, 20821725]

約数ペア:

[(1, 20821725), (3, 6940575), (5, 4164345), (9, 2313525), (15, 1388115), (25, 832869), (27, 771175), (45, 462705), (75, 277623), (109, 191025), (135, 154235), (225, 92541), (283, 73575), (327, 63675), (545, 38205), (675, 30847), (849, 24525), (981, 21225), (1415, 14715), (1635, 12735), (2547, 8175), (2725, 7641), (2943, 7075), (4245, 4905)]