20907880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{839}}^1$

素因数の和:946

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 33524120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 839, 890, 1246, 1678, 1780, 2492, 3115, 3356, 3560, 4195, 4984, 5873, 6230, 6712, 8390, 11746, 12460, 16780, 23492, 24920, 29365, 33560, 46984, 58730, 74671, 117460, 149342, 234920, 298684, 373355, 522697, 597368, 746710, 1045394, 1493420, 2090788, 2613485, 2986840, 4181576, 5226970, 10453940, 20907880]

約数ペア:

[(1, 20907880), (2, 10453940), (4, 5226970), (5, 4181576), (7, 2986840), (8, 2613485), (10, 2090788), (14, 1493420), (20, 1045394), (28, 746710), (35, 597368), (40, 522697), (56, 373355), (70, 298684), (89, 234920), (140, 149342), (178, 117460), (280, 74671), (356, 58730), (445, 46984), (623, 33560), (712, 29365), (839, 24920), (890, 23492), (1246, 16780), (1678, 12460), (1780, 11746), (2492, 8390), (3115, 6712), (3356, 6230), (3560, 5873), (4195, 4984)]