21647025

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:175

約数の個数: 72

約数和(自身を含む): 41783040

約数和(自身を除く): 20136015

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 47, 69, 75, 89, 115, 141, 207, 225, 235, 267, 345, 423, 445, 575, 705, 801, 1035, 1081, 1175, 1335, 1725, 2047, 2115, 2225, 3243, 3525, 4005, 4183, 5175, 5405, 6141, 6675, 9729, 10235, 10575, 12549, 16215, 18423, 20025, 20915, 27025, 30705, 37647, 48645, 51175, 62745, 81075, 92115, 96209, 104575, 153525, 188235, 243225, 288627, 313725, 460575, 481045, 865881, 941175, 1443135, 2405225, 4329405, 7215675, 21647025]

約数ペア:

[(1, 21647025), (3, 7215675), (5, 4329405), (9, 2405225), (15, 1443135), (23, 941175), (25, 865881), (45, 481045), (47, 460575), (69, 313725), (75, 288627), (89, 243225), (115, 188235), (141, 153525), (207, 104575), (225, 96209), (235, 92115), (267, 81075), (345, 62745), (423, 51175), (445, 48645), (575, 37647), (705, 30705), (801, 27025), (1035, 20915), (1081, 20025), (1175, 18423), (1335, 16215), (1725, 12549), (2047, 10575), (2115, 10235), (2225, 9729), (3243, 6675), (3525, 6141), (4005, 5405), (4183, 5175)]