80741960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:247

約数の個数: 128

約数和(自身を含む): 210228480

約数和(自身を除く): 129486520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 43, 46, 52, 65, 86, 92, 104, 115, 130, 157, 172, 184, 215, 230, 260, 299, 314, 344, 430, 460, 520, 559, 598, 628, 785, 860, 920, 989, 1118, 1196, 1256, 1495, 1570, 1720, 1978, 2041, 2236, 2392, 2795, 2990, 3140, 3611, 3956, 4082, 4472, 4945, 5590, 5980, 6280, 6751, 7222, 7912, 8164, 9890, 10205, 11180, 11960, 12857, 13502, 14444, 16328, 18055, 19780, 20410, 22360, 25714, 27004, 28888, 33755, 36110, 39560, 40820, 46943, 51428, 54008, 64285, 67510, 72220, 81640, 87763, 93886, 102856, 128570, 135020, 144440, 155273, 175526, 187772, 234715, 257140, 270040, 310546, 351052, 375544, 438815, 469430, 514280, 621092, 702104, 776365, 877630, 938860, 1242184, 1552730, 1755260, 1877720, 2018549, 3105460, 3510520, 4037098, 6210920, 8074196, 10092745, 16148392, 20185490, 40370980, 80741960]

約数ペア:

[(1, 80741960), (2, 40370980), (4, 20185490), (5, 16148392), (8, 10092745), (10, 8074196), (13, 6210920), (20, 4037098), (23, 3510520), (26, 3105460), (40, 2018549), (43, 1877720), (46, 1755260), (52, 1552730), (65, 1242184), (86, 938860), (92, 877630), (104, 776365), (115, 702104), (130, 621092), (157, 514280), (172, 469430), (184, 438815), (215, 375544), (230, 351052), (260, 310546), (299, 270040), (314, 257140), (344, 234715), (430, 187772), (460, 175526), (520, 155273), (559, 144440), (598, 135020), (628, 128570), (785, 102856), (860, 93886), (920, 87763), (989, 81640), (1118, 72220), (1196, 67510), (1256, 64285), (1495, 54008), (1570, 51428), (1720, 46943), (1978, 40820), (2041, 39560), (2236, 36110), (2392, 33755), (2795, 28888), (2990, 27004), (3140, 25714), (3611, 22360), (3956, 20410), (4082, 19780), (4472, 18055), (4945, 16328), (5590, 14444), (5980, 13502), (6280, 12857), (6751, 11960), (7222, 11180), (7912, 10205), (8164, 9890)]