12720580

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 27659520

約数和(自身を除く): 14938940

約数列:

[1, 2, 4, 5, 10, 20, 79, 83, 97, 158, 166, 194, 316, 332, 388, 395, 415, 485, 790, 830, 970, 1580, 1660, 1940, 6557, 7663, 8051, 13114, 15326, 16102, 26228, 30652, 32204, 32785, 38315, 40255, 65570, 76630, 80510, 131140, 153260, 161020, 636029, 1272058, 2544116, 3180145, 6360290, 12720580]

約数ペア:

[(1, 12720580), (2, 6360290), (4, 3180145), (5, 2544116), (10, 1272058), (20, 636029), (79, 161020), (83, 153260), (97, 131140), (158, 80510), (166, 76630), (194, 65570), (316, 40255), (332, 38315), (388, 32785), (395, 32204), (415, 30652), (485, 26228), (790, 16102), (830, 15326), (970, 13114), (1580, 8051), (1660, 7663), (1940, 6557)]