21203416

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{15683}}^1$

素因数の和:15715

約数の個数: 24

約数和(自身を含む): 43052580

約数和(自身を除く): 21849164

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 169, 338, 676, 1352, 15683, 31366, 62732, 125464, 203879, 407758, 815516, 1631032, 2650427, 5300854, 10601708, 21203416]

約数ペア:

[(1, 21203416), (2, 10601708), (4, 5300854), (8, 2650427), (13, 1631032), (26, 815516), (52, 407758), (104, 203879), (169, 125464), (338, 62732), (676, 31366), (1352, 15683)]