81619780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{271}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 192882816

約数和(自身を除く): 111263036

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 148, 185, 220, 271, 370, 407, 542, 740, 814, 1084, 1355, 1369, 1628, 2035, 2710, 2738, 2981, 4070, 5420, 5476, 5962, 6845, 8140, 10027, 11924, 13690, 14905, 15059, 20054, 27380, 29810, 30118, 40108, 50135, 59620, 60236, 75295, 100270, 110297, 150590, 200540, 220594, 301180, 370999, 441188, 551485, 741998, 1102970, 1483996, 1854995, 2205940, 3709990, 4080989, 7419980, 8161978, 16323956, 20404945, 40809890, 81619780]

約数ペア:

[(1, 81619780), (2, 40809890), (4, 20404945), (5, 16323956), (10, 8161978), (11, 7419980), (20, 4080989), (22, 3709990), (37, 2205940), (44, 1854995), (55, 1483996), (74, 1102970), (110, 741998), (148, 551485), (185, 441188), (220, 370999), (271, 301180), (370, 220594), (407, 200540), (542, 150590), (740, 110297), (814, 100270), (1084, 75295), (1355, 60236), (1369, 59620), (1628, 50135), (2035, 40108), (2710, 30118), (2738, 29810), (2981, 27380), (4070, 20054), (5420, 15059), (5476, 14905), (5962, 13690), (6845, 11924), (8140, 10027)]