21616270

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{647}}^1$

素因数の和:924

約数の個数: 32

約数和(自身を含む): 42130368

約数和(自身を除く): 20514098

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 257, 514, 647, 1285, 1294, 2570, 3235, 3341, 6470, 6682, 8411, 16705, 16822, 33410, 42055, 84110, 166279, 332558, 831395, 1662790, 2161627, 4323254, 10808135, 21616270]

約数ペア:

[(1, 21616270), (2, 10808135), (5, 4323254), (10, 2161627), (13, 1662790), (26, 831395), (65, 332558), (130, 166279), (257, 84110), (514, 42055), (647, 33410), (1285, 16822), (1294, 16705), (2570, 8411), (3235, 6682), (3341, 6470)]