215866820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{830257}}^1$

素因数の和:830279

約数の個数: 24

約数和(自身を含む): 488191704

約数和(自身を除く): 272324884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 830257, 1660514, 3321028, 4151285, 8302570, 10793341, 16605140, 21586682, 43173364, 53966705, 107933410, 215866820]

約数ペア:

[(1, 215866820), (2, 107933410), (4, 53966705), (5, 43173364), (10, 21586682), (13, 16605140), (20, 10793341), (26, 8302570), (52, 4151285), (65, 3321028), (130, 1660514), (260, 830257)]