21000833295

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2503}}^1\times {\mathrm{2531}}^1$

素因数の和:5072

約数の個数: 64

約数和(自身を含む): 38345094144

約数和(自身を除く): 17344260849

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 2503, 2531, 3315, 7509, 7593, 12515, 12655, 32539, 32903, 37545, 37965, 42551, 43027, 97617, 98709, 127653, 129081, 162695, 164515, 212755, 215135, 488085, 493545, 553163, 559351, 638265, 645405, 1659489, 1678053, 2765815, 2796755, 6335093, 8297445, 8390265, 19005279, 31675465, 82356209, 95026395, 107696581, 247068627, 323089743, 411781045, 538482905, 1235343135, 1400055553, 1615448715, 4200166659, 7000277765, 21000833295]

約数ペア:

[(1, 21000833295), (3, 7000277765), (5, 4200166659), (13, 1615448715), (15, 1400055553), (17, 1235343135), (39, 538482905), (51, 411781045), (65, 323089743), (85, 247068627), (195, 107696581), (221, 95026395), (255, 82356209), (663, 31675465), (1105, 19005279), (2503, 8390265), (2531, 8297445), (3315, 6335093), (7509, 2796755), (7593, 2765815), (12515, 1678053), (12655, 1659489), (32539, 645405), (32903, 638265), (37545, 559351), (37965, 553163), (42551, 493545), (43027, 488085), (97617, 215135), (98709, 212755), (127653, 164515), (129081, 162695)]