81287840

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:262

約数の個数: 96

約数和(自身を含む): 199584000

約数和(自身を除く): 118296160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 79, 80, 109, 118, 158, 160, 218, 236, 295, 316, 395, 436, 472, 545, 590, 632, 790, 872, 944, 1090, 1180, 1264, 1580, 1744, 1888, 2180, 2360, 2528, 3160, 3488, 4360, 4661, 4720, 6320, 6431, 8611, 8720, 9322, 9440, 12640, 12862, 17222, 17440, 18644, 23305, 25724, 32155, 34444, 37288, 43055, 46610, 51448, 64310, 68888, 74576, 86110, 93220, 102896, 128620, 137776, 149152, 172220, 186440, 205792, 257240, 275552, 344440, 372880, 508049, 514480, 688880, 745760, 1016098, 1028960, 1377760, 2032196, 2540245, 4064392, 5080490, 8128784, 10160980, 16257568, 20321960, 40643920, 81287840]

約数ペア:

[(1, 81287840), (2, 40643920), (4, 20321960), (5, 16257568), (8, 10160980), (10, 8128784), (16, 5080490), (20, 4064392), (32, 2540245), (40, 2032196), (59, 1377760), (79, 1028960), (80, 1016098), (109, 745760), (118, 688880), (158, 514480), (160, 508049), (218, 372880), (236, 344440), (295, 275552), (316, 257240), (395, 205792), (436, 186440), (472, 172220), (545, 149152), (590, 137776), (632, 128620), (790, 102896), (872, 93220), (944, 86110), (1090, 74576), (1180, 68888), (1264, 64310), (1580, 51448), (1744, 46610), (1888, 43055), (2180, 37288), (2360, 34444), (2528, 32155), (3160, 25724), (3488, 23305), (4360, 18644), (4661, 17440), (4720, 17222), (6320, 12862), (6431, 12640), (8611, 9440), (8720, 9322)]