20404886944

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{239}}^1\times {\mathrm{15787}}^1$

素因数の和:16062

約数の個数: 72

約数和(自身を含む): 43684764480

約数和(自身を除く): 23279877536

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 169, 208, 239, 338, 416, 478, 676, 956, 1352, 1912, 2704, 3107, 3824, 5408, 6214, 7648, 12428, 15787, 24856, 31574, 40391, 49712, 63148, 80782, 99424, 126296, 161564, 205231, 252592, 323128, 410462, 505184, 646256, 820924, 1292512, 1641848, 2668003, 3283696, 3773093, 5336006, 6567392, 7546186, 10672012, 15092372, 21344024, 30184744, 42688048, 49050209, 60369488, 85376096, 98100418, 120738976, 196200836, 392401672, 637652717, 784803344, 1275305434, 1569606688, 2550610868, 5101221736, 10202443472, 20404886944]

約数ペア:

[(1, 20404886944), (2, 10202443472), (4, 5101221736), (8, 2550610868), (13, 1569606688), (16, 1275305434), (26, 784803344), (32, 637652717), (52, 392401672), (104, 196200836), (169, 120738976), (208, 98100418), (239, 85376096), (338, 60369488), (416, 49050209), (478, 42688048), (676, 30184744), (956, 21344024), (1352, 15092372), (1912, 10672012), (2704, 7546186), (3107, 6567392), (3824, 5336006), (5408, 3773093), (6214, 3283696), (7648, 2668003), (12428, 1641848), (15787, 1292512), (24856, 820924), (31574, 646256), (40391, 505184), (49712, 410462), (63148, 323128), (80782, 252592), (99424, 205231), (126296, 161564)]