20394400

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:123

約数の個数: 144

約数和(自身を含む): 56105784

約数和(自身を除く): 35711384

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 37, 40, 50, 52, 53, 65, 74, 80, 100, 104, 106, 130, 148, 160, 185, 200, 208, 212, 260, 265, 296, 325, 370, 400, 416, 424, 481, 520, 530, 592, 650, 689, 740, 800, 848, 925, 962, 1040, 1060, 1184, 1300, 1325, 1378, 1480, 1696, 1850, 1924, 1961, 2080, 2120, 2405, 2600, 2650, 2756, 2960, 3445, 3700, 3848, 3922, 4240, 4810, 5200, 5300, 5512, 5920, 6890, 7400, 7696, 7844, 8480, 9620, 9805, 10400, 10600, 11024, 12025, 13780, 14800, 15392, 15688, 17225, 19240, 19610, 21200, 22048, 24050, 25493, 27560, 29600, 31376, 34450, 38480, 39220, 42400, 48100, 49025, 50986, 55120, 62752, 68900, 76960, 78440, 96200, 98050, 101972, 110240, 127465, 137800, 156880, 192400, 196100, 203944, 254930, 275600, 313760, 384800, 392200, 407888, 509860, 551200, 637325, 784400, 815776, 1019720, 1274650, 1568800, 2039440, 2549300, 4078880, 5098600, 10197200, 20394400]

約数ペア:

[(1, 20394400), (2, 10197200), (4, 5098600), (5, 4078880), (8, 2549300), (10, 2039440), (13, 1568800), (16, 1274650), (20, 1019720), (25, 815776), (26, 784400), (32, 637325), (37, 551200), (40, 509860), (50, 407888), (52, 392200), (53, 384800), (65, 313760), (74, 275600), (80, 254930), (100, 203944), (104, 196100), (106, 192400), (130, 156880), (148, 137800), (160, 127465), (185, 110240), (200, 101972), (208, 98050), (212, 96200), (260, 78440), (265, 76960), (296, 68900), (325, 62752), (370, 55120), (400, 50986), (416, 49025), (424, 48100), (481, 42400), (520, 39220), (530, 38480), (592, 34450), (650, 31376), (689, 29600), (740, 27560), (800, 25493), (848, 24050), (925, 22048), (962, 21200), (1040, 19610), (1060, 19240), (1184, 17225), (1300, 15688), (1325, 15392), (1378, 14800), (1480, 13780), (1696, 12025), (1850, 11024), (1924, 10600), (1961, 10400), (2080, 9805), (2120, 9620), (2405, 8480), (2600, 7844), (2650, 7696), (2756, 7400), (2960, 6890), (3445, 5920), (3700, 5512), (3848, 5300), (3922, 5200), (4240, 4810)]