19499900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:423

約数の個数: 72

約数和(自身を含む): 49059360

約数和(自身を除く): 29559460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 89, 100, 140, 175, 178, 313, 350, 356, 445, 623, 626, 700, 890, 1246, 1252, 1565, 1780, 2191, 2225, 2492, 3115, 3130, 4382, 4450, 6230, 6260, 7825, 8764, 8900, 10955, 12460, 15575, 15650, 21910, 27857, 31150, 31300, 43820, 54775, 55714, 62300, 109550, 111428, 139285, 194999, 219100, 278570, 389998, 557140, 696425, 779996, 974995, 1392850, 1949990, 2785700, 3899980, 4874975, 9749950, 19499900]

約数ペア:

[(1, 19499900), (2, 9749950), (4, 4874975), (5, 3899980), (7, 2785700), (10, 1949990), (14, 1392850), (20, 974995), (25, 779996), (28, 696425), (35, 557140), (50, 389998), (70, 278570), (89, 219100), (100, 194999), (140, 139285), (175, 111428), (178, 109550), (313, 62300), (350, 55714), (356, 54775), (445, 43820), (623, 31300), (626, 31150), (700, 27857), (890, 21910), (1246, 15650), (1252, 15575), (1565, 12460), (1780, 10955), (2191, 8900), (2225, 8764), (2492, 7825), (3115, 6260), (3130, 6230), (4382, 4450)]