20561175

素因数分解:

$3^3\times 5^2\times {\mathrm{83}}^1\times {\mathrm{367}}^1$

素因数の和:469

約数の個数: 48

約数和(自身を含む): 38330880

約数和(自身を除く): 17769705

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 83, 135, 225, 249, 367, 415, 675, 747, 1101, 1245, 1835, 2075, 2241, 3303, 3735, 5505, 6225, 9175, 9909, 11205, 16515, 18675, 27525, 30461, 49545, 56025, 82575, 91383, 152305, 247725, 274149, 456915, 761525, 822447, 1370745, 2284575, 4112235, 6853725, 20561175]

約数ペア:

[(1, 20561175), (3, 6853725), (5, 4112235), (9, 2284575), (15, 1370745), (25, 822447), (27, 761525), (45, 456915), (75, 274149), (83, 247725), (135, 152305), (225, 91383), (249, 82575), (367, 56025), (415, 49545), (675, 30461), (747, 27525), (1101, 18675), (1245, 16515), (1835, 11205), (2075, 9909), (2241, 9175), (3303, 6225), (3735, 5505)]