20956910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 43642368

約数和(自身を除く): 22685458

約数列:

[1, 2, 5, 10, 13, 23, 26, 43, 46, 65, 86, 115, 130, 163, 215, 230, 299, 326, 430, 559, 598, 815, 989, 1118, 1495, 1630, 1978, 2119, 2795, 2990, 3749, 4238, 4945, 5590, 7009, 7498, 9890, 10595, 12857, 14018, 18745, 21190, 25714, 35045, 37490, 48737, 64285, 70090, 91117, 97474, 128570, 161207, 182234, 243685, 322414, 455585, 487370, 806035, 911170, 1612070, 2095691, 4191382, 10478455, 20956910]

約数ペア:

[(1, 20956910), (2, 10478455), (5, 4191382), (10, 2095691), (13, 1612070), (23, 911170), (26, 806035), (43, 487370), (46, 455585), (65, 322414), (86, 243685), (115, 182234), (130, 161207), (163, 128570), (215, 97474), (230, 91117), (299, 70090), (326, 64285), (430, 48737), (559, 37490), (598, 35045), (815, 25714), (989, 21190), (1118, 18745), (1495, 14018), (1630, 12857), (1978, 10595), (2119, 9890), (2795, 7498), (2990, 7009), (3749, 5590), (4238, 4945)]