21645897

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 37078272

約数和(自身を除く): 15432375

約数列:

[1, 3, 7, 13, 21, 39, 47, 49, 91, 141, 147, 241, 273, 329, 611, 637, 723, 987, 1687, 1833, 1911, 2303, 3133, 4277, 5061, 6909, 9399, 11327, 11809, 12831, 21931, 29939, 33981, 35427, 65793, 79289, 89817, 147251, 153517, 237867, 441753, 460551, 555023, 1030757, 1665069, 3092271, 7215299, 21645897]

約数ペア:

[(1, 21645897), (3, 7215299), (7, 3092271), (13, 1665069), (21, 1030757), (39, 555023), (47, 460551), (49, 441753), (91, 237867), (141, 153517), (147, 147251), (241, 89817), (273, 79289), (329, 65793), (611, 35427), (637, 33981), (723, 29939), (987, 21931), (1687, 12831), (1833, 11809), (1911, 11327), (2303, 9399), (3133, 6909), (4277, 5061)]