20068880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{839}}^1$

素因数の和:888

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 32427760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 839, 920, 1040, 1196, 1495, 1678, 1840, 2392, 2990, 3356, 4195, 4784, 5980, 6712, 8390, 10907, 11960, 13424, 16780, 19297, 21814, 23920, 33560, 38594, 43628, 54535, 67120, 77188, 87256, 96485, 109070, 154376, 174512, 192970, 218140, 250861, 308752, 385940, 436280, 501722, 771880, 872560, 1003444, 1254305, 1543760, 2006888, 2508610, 4013776, 5017220, 10034440, 20068880]

約数ペア:

[(1, 20068880), (2, 10034440), (4, 5017220), (5, 4013776), (8, 2508610), (10, 2006888), (13, 1543760), (16, 1254305), (20, 1003444), (23, 872560), (26, 771880), (40, 501722), (46, 436280), (52, 385940), (65, 308752), (80, 250861), (92, 218140), (104, 192970), (115, 174512), (130, 154376), (184, 109070), (208, 96485), (230, 87256), (260, 77188), (299, 67120), (368, 54535), (460, 43628), (520, 38594), (598, 33560), (839, 23920), (920, 21814), (1040, 19297), (1196, 16780), (1495, 13424), (1678, 11960), (1840, 10907), (2392, 8390), (2990, 6712), (3356, 5980), (4195, 4784)]