21991504

素因数分解:

$2^4\times {\mathrm{197}}^1\times {\mathrm{6977}}^1$

素因数の和:7182

約数の個数: 20

約数和(自身を含む): 42830964

約数和(自身を除く): 20839460

約数列:

[1, 2, 4, 8, 16, 197, 394, 788, 1576, 3152, 6977, 13954, 27908, 55816, 111632, 1374469, 2748938, 5497876, 10995752, 21991504]

約数ペア:

[(1, 21991504), (2, 10995752), (4, 5497876), (8, 2748938), (16, 1374469), (197, 111632), (394, 55816), (788, 27908), (1576, 13954), (3152, 6977)]