20531640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:253

約数の個数: 128

約数和(自身を含む): 66147840

約数和(自身を除く): 45616200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 40, 43, 46, 60, 69, 86, 92, 115, 120, 129, 138, 172, 173, 184, 215, 230, 258, 276, 344, 345, 346, 430, 460, 516, 519, 552, 645, 690, 692, 860, 865, 920, 989, 1032, 1038, 1290, 1380, 1384, 1720, 1730, 1978, 2076, 2580, 2595, 2760, 2967, 3460, 3956, 3979, 4152, 4945, 5160, 5190, 5934, 6920, 7439, 7912, 7958, 9890, 10380, 11868, 11937, 14835, 14878, 15916, 19780, 19895, 20760, 22317, 23736, 23874, 29670, 29756, 31832, 37195, 39560, 39790, 44634, 47748, 59340, 59512, 59685, 74390, 79580, 89268, 95496, 111585, 118680, 119370, 148780, 159160, 171097, 178536, 223170, 238740, 297560, 342194, 446340, 477480, 513291, 684388, 855485, 892680, 1026582, 1368776, 1710970, 2053164, 2566455, 3421940, 4106328, 5132910, 6843880, 10265820, 20531640]

約数ペア:

[(1, 20531640), (2, 10265820), (3, 6843880), (4, 5132910), (5, 4106328), (6, 3421940), (8, 2566455), (10, 2053164), (12, 1710970), (15, 1368776), (20, 1026582), (23, 892680), (24, 855485), (30, 684388), (40, 513291), (43, 477480), (46, 446340), (60, 342194), (69, 297560), (86, 238740), (92, 223170), (115, 178536), (120, 171097), (129, 159160), (138, 148780), (172, 119370), (173, 118680), (184, 111585), (215, 95496), (230, 89268), (258, 79580), (276, 74390), (344, 59685), (345, 59512), (346, 59340), (430, 47748), (460, 44634), (516, 39790), (519, 39560), (552, 37195), (645, 31832), (690, 29756), (692, 29670), (860, 23874), (865, 23736), (920, 22317), (989, 20760), (1032, 19895), (1038, 19780), (1290, 15916), (1380, 14878), (1384, 14835), (1720, 11937), (1730, 11868), (1978, 10380), (2076, 9890), (2580, 7958), (2595, 7912), (2760, 7439), (2967, 6920), (3460, 5934), (3956, 5190), (3979, 5160), (4152, 4945)]