21493600

素因数分解:

$2^5\times 5^2\times {\mathrm{67}}^1\times {\mathrm{401}}^1$

素因数の和:488

約数の個数: 72

約数和(自身を含む): 53387208

約数和(自身を除く): 31893608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 67, 80, 100, 134, 160, 200, 268, 335, 400, 401, 536, 670, 800, 802, 1072, 1340, 1604, 1675, 2005, 2144, 2680, 3208, 3350, 4010, 5360, 6416, 6700, 8020, 10025, 10720, 12832, 13400, 16040, 20050, 26800, 26867, 32080, 40100, 53600, 53734, 64160, 80200, 107468, 134335, 160400, 214936, 268670, 320800, 429872, 537340, 671675, 859744, 1074680, 1343350, 2149360, 2686700, 4298720, 5373400, 10746800, 21493600]

約数ペア:

[(1, 21493600), (2, 10746800), (4, 5373400), (5, 4298720), (8, 2686700), (10, 2149360), (16, 1343350), (20, 1074680), (25, 859744), (32, 671675), (40, 537340), (50, 429872), (67, 320800), (80, 268670), (100, 214936), (134, 160400), (160, 134335), (200, 107468), (268, 80200), (335, 64160), (400, 53734), (401, 53600), (536, 40100), (670, 32080), (800, 26867), (802, 26800), (1072, 20050), (1340, 16040), (1604, 13400), (1675, 12832), (2005, 10720), (2144, 10025), (2680, 8020), (3208, 6700), (3350, 6416), (4010, 5360)]