21336140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{593}}^1$

素因数の和:866

約数の個数: 48

約数和(自身を含む): 51492672

約数和(自身を除く): 30156532

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 257, 514, 593, 1028, 1186, 1285, 1799, 2372, 2570, 2965, 3598, 4151, 5140, 5930, 7196, 8302, 8995, 11860, 16604, 17990, 20755, 35980, 41510, 83020, 152401, 304802, 609604, 762005, 1066807, 1524010, 2133614, 3048020, 4267228, 5334035, 10668070, 21336140]

約数ペア:

[(1, 21336140), (2, 10668070), (4, 5334035), (5, 4267228), (7, 3048020), (10, 2133614), (14, 1524010), (20, 1066807), (28, 762005), (35, 609604), (70, 304802), (140, 152401), (257, 83020), (514, 41510), (593, 35980), (1028, 20755), (1186, 17990), (1285, 16604), (1799, 11860), (2372, 8995), (2570, 8302), (2965, 7196), (3598, 5930), (4151, 5140)]