21482800

素因数分解:

$2^4\times 5^2\times {\mathrm{43}}^1\times {\mathrm{1249}}^1$

素因数の和:1310

約数の個数: 60

約数和(自身を含む): 52855000

約数和(自身を除く): 31372200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 43, 50, 80, 86, 100, 172, 200, 215, 344, 400, 430, 688, 860, 1075, 1249, 1720, 2150, 2498, 3440, 4300, 4996, 6245, 8600, 9992, 12490, 17200, 19984, 24980, 31225, 49960, 53707, 62450, 99920, 107414, 124900, 214828, 249800, 268535, 429656, 499600, 537070, 859312, 1074140, 1342675, 2148280, 2685350, 4296560, 5370700, 10741400, 21482800]

約数ペア:

[(1, 21482800), (2, 10741400), (4, 5370700), (5, 4296560), (8, 2685350), (10, 2148280), (16, 1342675), (20, 1074140), (25, 859312), (40, 537070), (43, 499600), (50, 429656), (80, 268535), (86, 249800), (100, 214828), (172, 124900), (200, 107414), (215, 99920), (344, 62450), (400, 53707), (430, 49960), (688, 31225), (860, 24980), (1075, 19984), (1249, 17200), (1720, 12490), (2150, 9992), (2498, 8600), (3440, 6245), (4300, 4996)]