51350000

素因数分解:

$2^4\times 5^5\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:125

約数の個数: 120

約数和(自身を含む): 135616320

約数和(自身を除く): 84266320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 79, 80, 100, 104, 125, 130, 158, 200, 208, 250, 260, 316, 325, 395, 400, 500, 520, 625, 632, 650, 790, 1000, 1027, 1040, 1250, 1264, 1300, 1580, 1625, 1975, 2000, 2054, 2500, 2600, 3125, 3160, 3250, 3950, 4108, 5000, 5135, 5200, 6250, 6320, 6500, 7900, 8125, 8216, 9875, 10000, 10270, 12500, 13000, 15800, 16250, 16432, 19750, 20540, 25000, 25675, 26000, 31600, 32500, 39500, 40625, 41080, 49375, 50000, 51350, 65000, 79000, 81250, 82160, 98750, 102700, 128375, 130000, 158000, 162500, 197500, 205400, 246875, 256750, 325000, 395000, 410800, 493750, 513500, 641875, 650000, 790000, 987500, 1027000, 1283750, 1975000, 2054000, 2567500, 3209375, 3950000, 5135000, 6418750, 10270000, 12837500, 25675000, 51350000]

約数ペア:

[(1, 51350000), (2, 25675000), (4, 12837500), (5, 10270000), (8, 6418750), (10, 5135000), (13, 3950000), (16, 3209375), (20, 2567500), (25, 2054000), (26, 1975000), (40, 1283750), (50, 1027000), (52, 987500), (65, 790000), (79, 650000), (80, 641875), (100, 513500), (104, 493750), (125, 410800), (130, 395000), (158, 325000), (200, 256750), (208, 246875), (250, 205400), (260, 197500), (316, 162500), (325, 158000), (395, 130000), (400, 128375), (500, 102700), (520, 98750), (625, 82160), (632, 81250), (650, 79000), (790, 65000), (1000, 51350), (1027, 50000), (1040, 49375), (1250, 41080), (1264, 40625), (1300, 39500), (1580, 32500), (1625, 31600), (1975, 26000), (2000, 25675), (2054, 25000), (2500, 20540), (2600, 19750), (3125, 16432), (3160, 16250), (3250, 15800), (3950, 13000), (4108, 12500), (5000, 10270), (5135, 10000), (5200, 9875), (6250, 8216), (6320, 8125), (6500, 7900)]