840507940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{31153}}^1$

素因数の和:31252

約数の個数: 48

約数和(自身を含む): 1884193920

約数和(自身を除く): 1043685980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 710, 1349, 1420, 2698, 5396, 6745, 13490, 26980, 31153, 62306, 124612, 155765, 311530, 591907, 623060, 1183814, 2211863, 2367628, 2959535, 4423726, 5919070, 8847452, 11059315, 11838140, 22118630, 42025397, 44237260, 84050794, 168101588, 210126985, 420253970, 840507940]

約数ペア:

[(1, 840507940), (2, 420253970), (4, 210126985), (5, 168101588), (10, 84050794), (19, 44237260), (20, 42025397), (38, 22118630), (71, 11838140), (76, 11059315), (95, 8847452), (142, 5919070), (190, 4423726), (284, 2959535), (355, 2367628), (380, 2211863), (710, 1183814), (1349, 623060), (1420, 591907), (2698, 311530), (5396, 155765), (6745, 124612), (13490, 62306), (26980, 31153)]