20705160

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{157}}^2$

素因数の和:335

約数の個数: 96

約数和(自身を含む): 71444160

約数和(自身を除く): 50739000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 157, 168, 210, 280, 314, 420, 471, 628, 785, 840, 942, 1099, 1256, 1570, 1884, 2198, 2355, 3140, 3297, 3768, 4396, 4710, 5495, 6280, 6594, 8792, 9420, 10990, 13188, 16485, 18840, 21980, 24649, 26376, 32970, 43960, 49298, 65940, 73947, 98596, 123245, 131880, 147894, 172543, 197192, 246490, 295788, 345086, 369735, 492980, 517629, 591576, 690172, 739470, 862715, 985960, 1035258, 1380344, 1478940, 1725430, 2070516, 2588145, 2957880, 3450860, 4141032, 5176290, 6901720, 10352580, 20705160]

約数ペア:

[(1, 20705160), (2, 10352580), (3, 6901720), (4, 5176290), (5, 4141032), (6, 3450860), (7, 2957880), (8, 2588145), (10, 2070516), (12, 1725430), (14, 1478940), (15, 1380344), (20, 1035258), (21, 985960), (24, 862715), (28, 739470), (30, 690172), (35, 591576), (40, 517629), (42, 492980), (56, 369735), (60, 345086), (70, 295788), (84, 246490), (105, 197192), (120, 172543), (140, 147894), (157, 131880), (168, 123245), (210, 98596), (280, 73947), (314, 65940), (420, 49298), (471, 43960), (628, 32970), (785, 26376), (840, 24649), (942, 21980), (1099, 18840), (1256, 16485), (1570, 13188), (1884, 10990), (2198, 9420), (2355, 8792), (3140, 6594), (3297, 6280), (3768, 5495), (4396, 4710)]