21780500

素因数分解:

$2^2\times 5^3\times 7^3\times {\mathrm{127}}^1$

素因数の和:167

約数の個数: 96

約数和(自身を含む): 55910400

約数和(自身を除く): 34129900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 125, 127, 140, 175, 196, 245, 250, 254, 343, 350, 490, 500, 508, 635, 686, 700, 875, 889, 980, 1225, 1270, 1372, 1715, 1750, 1778, 2450, 2540, 3175, 3430, 3500, 3556, 4445, 4900, 6125, 6223, 6350, 6860, 8575, 8890, 12250, 12446, 12700, 15875, 17150, 17780, 22225, 24500, 24892, 31115, 31750, 34300, 42875, 43561, 44450, 62230, 63500, 85750, 87122, 88900, 111125, 124460, 155575, 171500, 174244, 217805, 222250, 311150, 435610, 444500, 622300, 777875, 871220, 1089025, 1555750, 2178050, 3111500, 4356100, 5445125, 10890250, 21780500]

約数ペア:

[(1, 21780500), (2, 10890250), (4, 5445125), (5, 4356100), (7, 3111500), (10, 2178050), (14, 1555750), (20, 1089025), (25, 871220), (28, 777875), (35, 622300), (49, 444500), (50, 435610), (70, 311150), (98, 222250), (100, 217805), (125, 174244), (127, 171500), (140, 155575), (175, 124460), (196, 111125), (245, 88900), (250, 87122), (254, 85750), (343, 63500), (350, 62230), (490, 44450), (500, 43561), (508, 42875), (635, 34300), (686, 31750), (700, 31115), (875, 24892), (889, 24500), (980, 22225), (1225, 17780), (1270, 17150), (1372, 15875), (1715, 12700), (1750, 12446), (1778, 12250), (2450, 8890), (2540, 8575), (3175, 6860), (3430, 6350), (3500, 6223), (3556, 6125), (4445, 4900)]