21705060

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27827}}^1$

素因数の和:27852

約数の個数: 48

約数和(自身を含む): 65451456

約数和(自身を除く): 43746396

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27827, 55654, 83481, 111308, 139135, 166962, 278270, 333924, 361751, 417405, 556540, 723502, 834810, 1085253, 1447004, 1669620, 1808755, 2170506, 3617510, 4341012, 5426265, 7235020, 10852530, 21705060]

約数ペア:

[(1, 21705060), (2, 10852530), (3, 7235020), (4, 5426265), (5, 4341012), (6, 3617510), (10, 2170506), (12, 1808755), (13, 1669620), (15, 1447004), (20, 1085253), (26, 834810), (30, 723502), (39, 556540), (52, 417405), (60, 361751), (65, 333924), (78, 278270), (130, 166962), (156, 139135), (195, 111308), (260, 83481), (390, 55654), (780, 27827)]