21707036

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:390

約数の個数: 36

約数和(自身を含む): 41596632

約数和(自身を除く): 19889596

約数列:

[1, 2, 4, 13, 26, 52, 163, 169, 197, 326, 338, 394, 652, 676, 788, 2119, 2561, 4238, 5122, 8476, 10244, 27547, 32111, 33293, 55094, 64222, 66586, 110188, 128444, 133172, 417443, 834886, 1669772, 5426759, 10853518, 21707036]

約数ペア:

[(1, 21707036), (2, 10853518), (4, 5426759), (13, 1669772), (26, 834886), (52, 417443), (163, 133172), (169, 128444), (197, 110188), (326, 66586), (338, 64222), (394, 55094), (652, 33293), (676, 32111), (788, 27547), (2119, 10244), (2561, 8476), (4238, 5122)]