81906400

素因数分解:

$2^5\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2381}}^1$

素因数の和:2444

約数の個数: 72

約数和(自身を含む): 204690024

約数和(自身を除く): 122783624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 43, 50, 80, 86, 100, 160, 172, 200, 215, 344, 400, 430, 688, 800, 860, 1075, 1376, 1720, 2150, 2381, 3440, 4300, 4762, 6880, 8600, 9524, 11905, 17200, 19048, 23810, 34400, 38096, 47620, 59525, 76192, 95240, 102383, 119050, 190480, 204766, 238100, 380960, 409532, 476200, 511915, 819064, 952400, 1023830, 1638128, 1904800, 2047660, 2559575, 3276256, 4095320, 5119150, 8190640, 10238300, 16381280, 20476600, 40953200, 81906400]

約数ペア:

[(1, 81906400), (2, 40953200), (4, 20476600), (5, 16381280), (8, 10238300), (10, 8190640), (16, 5119150), (20, 4095320), (25, 3276256), (32, 2559575), (40, 2047660), (43, 1904800), (50, 1638128), (80, 1023830), (86, 952400), (100, 819064), (160, 511915), (172, 476200), (200, 409532), (215, 380960), (344, 238100), (400, 204766), (430, 190480), (688, 119050), (800, 102383), (860, 95240), (1075, 76192), (1376, 59525), (1720, 47620), (2150, 38096), (2381, 34400), (3440, 23810), (4300, 19048), (4762, 17200), (6880, 11905), (8600, 9524)]