21149180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81343}}^1$

素因数の和:81365

約数の個数: 24

約数和(自身を含む): 47830272

約数和(自身を除く): 26681092

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81343, 162686, 325372, 406715, 813430, 1057459, 1626860, 2114918, 4229836, 5287295, 10574590, 21149180]

約数ペア:

[(1, 21149180), (2, 10574590), (4, 5287295), (5, 4229836), (10, 2114918), (13, 1626860), (20, 1057459), (26, 813430), (52, 406715), (65, 325372), (130, 162686), (260, 81343)]