20765480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{307}}^1$

素因数の和:426

約数の個数: 64

約数和(自身を含む): 49896000

約数和(自身を除く): 29130520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 89, 95, 152, 178, 190, 307, 356, 380, 445, 614, 712, 760, 890, 1228, 1535, 1691, 1780, 2456, 3070, 3382, 3560, 5833, 6140, 6764, 8455, 11666, 12280, 13528, 16910, 23332, 27323, 29165, 33820, 46664, 54646, 58330, 67640, 109292, 116660, 136615, 218584, 233320, 273230, 519137, 546460, 1038274, 1092920, 2076548, 2595685, 4153096, 5191370, 10382740, 20765480]

約数ペア:

[(1, 20765480), (2, 10382740), (4, 5191370), (5, 4153096), (8, 2595685), (10, 2076548), (19, 1092920), (20, 1038274), (38, 546460), (40, 519137), (76, 273230), (89, 233320), (95, 218584), (152, 136615), (178, 116660), (190, 109292), (307, 67640), (356, 58330), (380, 54646), (445, 46664), (614, 33820), (712, 29165), (760, 27323), (890, 23332), (1228, 16910), (1535, 13528), (1691, 12280), (1780, 11666), (2456, 8455), (3070, 6764), (3382, 6140), (3560, 5833)]