20540000

素因数分解:

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

素因数の和:122

約数の個数: 120

約数和(自身を含む): 55107360

約数和(自身を除く): 34567360

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 79, 80, 100, 104, 125, 130, 158, 160, 200, 208, 250, 260, 316, 325, 395, 400, 416, 500, 520, 625, 632, 650, 790, 800, 1000, 1027, 1040, 1250, 1264, 1300, 1580, 1625, 1975, 2000, 2054, 2080, 2500, 2528, 2600, 3160, 3250, 3950, 4000, 4108, 5000, 5135, 5200, 6320, 6500, 7900, 8125, 8216, 9875, 10000, 10270, 10400, 12640, 13000, 15800, 16250, 16432, 19750, 20000, 20540, 25675, 26000, 31600, 32500, 32864, 39500, 41080, 49375, 51350, 52000, 63200, 65000, 79000, 82160, 98750, 102700, 128375, 130000, 158000, 164320, 197500, 205400, 256750, 260000, 316000, 395000, 410800, 513500, 641875, 790000, 821600, 1027000, 1283750, 1580000, 2054000, 2567500, 4108000, 5135000, 10270000, 20540000]

約数ペア:

[(1, 20540000), (2, 10270000), (4, 5135000), (5, 4108000), (8, 2567500), (10, 2054000), (13, 1580000), (16, 1283750), (20, 1027000), (25, 821600), (26, 790000), (32, 641875), (40, 513500), (50, 410800), (52, 395000), (65, 316000), (79, 260000), (80, 256750), (100, 205400), (104, 197500), (125, 164320), (130, 158000), (158, 130000), (160, 128375), (200, 102700), (208, 98750), (250, 82160), (260, 79000), (316, 65000), (325, 63200), (395, 52000), (400, 51350), (416, 49375), (500, 41080), (520, 39500), (625, 32864), (632, 32500), (650, 31600), (790, 26000), (800, 25675), (1000, 20540), (1027, 20000), (1040, 19750), (1250, 16432), (1264, 16250), (1300, 15800), (1580, 13000), (1625, 12640), (1975, 10400), (2000, 10270), (2054, 10000), (2080, 9875), (2500, 8216), (2528, 8125), (2600, 7900), (3160, 6500), (3250, 6320), (3950, 5200), (4000, 5135), (4108, 5000)]