20561528

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{937}}^1$

素因数の和:1167

約数の個数: 32

約数和(自身を含む): 41759760

約数和(自身を除く): 21198232

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211, 422, 844, 937, 1688, 1874, 2743, 3748, 5486, 7496, 10972, 12181, 21944, 24362, 48724, 97448, 197707, 395414, 790828, 1581656, 2570191, 5140382, 10280764, 20561528]

約数ペア:

[(1, 20561528), (2, 10280764), (4, 5140382), (8, 2570191), (13, 1581656), (26, 790828), (52, 395414), (104, 197707), (211, 97448), (422, 48724), (844, 24362), (937, 21944), (1688, 12181), (1874, 10972), (2743, 7496), (3748, 5486)]