21070504

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{281}}^1$

素因数の和:410

約数の個数: 64

約数和(自身を含む): 49271040

約数和(自身を除く): 28200536

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 103, 104, 182, 206, 281, 364, 412, 562, 721, 728, 824, 1124, 1339, 1442, 1967, 2248, 2678, 2884, 3653, 3934, 5356, 5768, 7306, 7868, 9373, 10712, 14612, 15736, 18746, 25571, 28943, 29224, 37492, 51142, 57886, 74984, 102284, 115772, 202601, 204568, 231544, 376259, 405202, 752518, 810404, 1505036, 1620808, 2633813, 3010072, 5267626, 10535252, 21070504]

約数ペア:

[(1, 21070504), (2, 10535252), (4, 5267626), (7, 3010072), (8, 2633813), (13, 1620808), (14, 1505036), (26, 810404), (28, 752518), (52, 405202), (56, 376259), (91, 231544), (103, 204568), (104, 202601), (182, 115772), (206, 102284), (281, 74984), (364, 57886), (412, 51142), (562, 37492), (721, 29224), (728, 28943), (824, 25571), (1124, 18746), (1339, 15736), (1442, 14612), (1967, 10712), (2248, 9373), (2678, 7868), (2884, 7306), (3653, 5768), (3934, 5356)]