19804725

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:171

約数の個数: 72

約数和(自身を含む): 38301120

約数和(自身を除く): 18496395

約数列:

[1, 3, 5, 9, 15, 23, 25, 43, 45, 69, 75, 89, 115, 129, 207, 215, 225, 267, 345, 387, 445, 575, 645, 801, 989, 1035, 1075, 1335, 1725, 1935, 2047, 2225, 2967, 3225, 3827, 4005, 4945, 5175, 6141, 6675, 8901, 9675, 10235, 11481, 14835, 18423, 19135, 20025, 24725, 30705, 34443, 44505, 51175, 57405, 74175, 88021, 92115, 95675, 153525, 172215, 222525, 264063, 287025, 440105, 460575, 792189, 861075, 1320315, 2200525, 3960945, 6601575, 19804725]

約数ペア:

[(1, 19804725), (3, 6601575), (5, 3960945), (9, 2200525), (15, 1320315), (23, 861075), (25, 792189), (43, 460575), (45, 440105), (69, 287025), (75, 264063), (89, 222525), (115, 172215), (129, 153525), (207, 95675), (215, 92115), (225, 88021), (267, 74175), (345, 57405), (387, 51175), (445, 44505), (575, 34443), (645, 30705), (801, 24725), (989, 20025), (1035, 19135), (1075, 18423), (1335, 14835), (1725, 11481), (1935, 10235), (2047, 9675), (2225, 8901), (2967, 6675), (3225, 6141), (3827, 5175), (4005, 4945)]