781401980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1319}}^1\times {\mathrm{1559}}^1$

素因数の和:2906

約数の個数: 48

約数和(自身を含む): 1729728000

約数和(自身を除く): 948326020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 1319, 1559, 2638, 3118, 5276, 6236, 6595, 7795, 13190, 15590, 25061, 26380, 29621, 31180, 50122, 59242, 100244, 118484, 125305, 148105, 250610, 296210, 501220, 592420, 2056321, 4112642, 8225284, 10281605, 20563210, 39070099, 41126420, 78140198, 156280396, 195350495, 390700990, 781401980]

約数ペア:

[(1, 781401980), (2, 390700990), (4, 195350495), (5, 156280396), (10, 78140198), (19, 41126420), (20, 39070099), (38, 20563210), (76, 10281605), (95, 8225284), (190, 4112642), (380, 2056321), (1319, 592420), (1559, 501220), (2638, 296210), (3118, 250610), (5276, 148105), (6236, 125305), (6595, 118484), (7795, 100244), (13190, 59242), (15590, 50122), (25061, 31180), (26380, 29621)]