128656240

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{20357}}^1$

素因数の和:20449

約数の個数: 40

約数和(自身を含む): 302927040

約数和(自身を除く): 174270800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 20357, 40714, 81428, 101785, 162856, 203570, 325712, 407140, 814280, 1608203, 1628560, 3216406, 6432812, 8041015, 12865624, 16082030, 25731248, 32164060, 64328120, 128656240]

約数ペア:

[(1, 128656240), (2, 64328120), (4, 32164060), (5, 25731248), (8, 16082030), (10, 12865624), (16, 8041015), (20, 6432812), (40, 3216406), (79, 1628560), (80, 1608203), (158, 814280), (316, 407140), (395, 325712), (632, 203570), (790, 162856), (1264, 101785), (1580, 81428), (3160, 40714), (6320, 20357)]