21025900

素因数分解:

$2^2\times 5^2\times 7^3\times {\mathrm{613}}^1$

素因数の和:648

約数の個数: 72

約数和(自身を含む): 53295200

約数和(自身を除く): 32269300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 343, 350, 490, 613, 686, 700, 980, 1225, 1226, 1372, 1715, 2450, 2452, 3065, 3430, 4291, 4900, 6130, 6860, 8575, 8582, 12260, 15325, 17150, 17164, 21455, 30037, 30650, 34300, 42910, 60074, 61300, 85820, 107275, 120148, 150185, 210259, 214550, 300370, 420518, 429100, 600740, 750925, 841036, 1051295, 1501850, 2102590, 3003700, 4205180, 5256475, 10512950, 21025900]

約数ペア:

[(1, 21025900), (2, 10512950), (4, 5256475), (5, 4205180), (7, 3003700), (10, 2102590), (14, 1501850), (20, 1051295), (25, 841036), (28, 750925), (35, 600740), (49, 429100), (50, 420518), (70, 300370), (98, 214550), (100, 210259), (140, 150185), (175, 120148), (196, 107275), (245, 85820), (343, 61300), (350, 60074), (490, 42910), (613, 34300), (686, 30650), (700, 30037), (980, 21455), (1225, 17164), (1226, 17150), (1372, 15325), (1715, 12260), (2450, 8582), (2452, 8575), (3065, 6860), (3430, 6130), (4291, 4900)]