21540400

素因数分解:

$2^4\times 5^2\times 7^3\times {\mathrm{157}}^1$

素因数の和:196

約数の個数: 120

約数和(自身を含む): 60735200

約数和(自身を除く): 39194800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 140, 157, 175, 196, 200, 245, 280, 314, 343, 350, 392, 400, 490, 560, 628, 686, 700, 784, 785, 980, 1099, 1225, 1256, 1372, 1400, 1570, 1715, 1960, 2198, 2450, 2512, 2744, 2800, 3140, 3430, 3920, 3925, 4396, 4900, 5488, 5495, 6280, 6860, 7693, 7850, 8575, 8792, 9800, 10990, 12560, 13720, 15386, 15700, 17150, 17584, 19600, 21980, 27440, 27475, 30772, 31400, 34300, 38465, 43960, 53851, 54950, 61544, 62800, 68600, 76930, 87920, 107702, 109900, 123088, 137200, 153860, 192325, 215404, 219800, 269255, 307720, 384650, 430808, 439600, 538510, 615440, 769300, 861616, 1077020, 1346275, 1538600, 2154040, 2692550, 3077200, 4308080, 5385100, 10770200, 21540400]

約数ペア:

[(1, 21540400), (2, 10770200), (4, 5385100), (5, 4308080), (7, 3077200), (8, 2692550), (10, 2154040), (14, 1538600), (16, 1346275), (20, 1077020), (25, 861616), (28, 769300), (35, 615440), (40, 538510), (49, 439600), (50, 430808), (56, 384650), (70, 307720), (80, 269255), (98, 219800), (100, 215404), (112, 192325), (140, 153860), (157, 137200), (175, 123088), (196, 109900), (200, 107702), (245, 87920), (280, 76930), (314, 68600), (343, 62800), (350, 61544), (392, 54950), (400, 53851), (490, 43960), (560, 38465), (628, 34300), (686, 31400), (700, 30772), (784, 27475), (785, 27440), (980, 21980), (1099, 19600), (1225, 17584), (1256, 17150), (1372, 15700), (1400, 15386), (1570, 13720), (1715, 12560), (1960, 10990), (2198, 9800), (2450, 8792), (2512, 8575), (2744, 7850), (2800, 7693), (3140, 6860), (3430, 6280), (3920, 5495), (3925, 5488), (4396, 4900)]