181818

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1$

素因数の和:68

約数の個数: 64

約数和(自身を含む): 510720

約数和(自身を除く): 328902

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 27, 37, 39, 42, 54, 63, 74, 78, 91, 111, 117, 126, 182, 189, 222, 234, 259, 273, 333, 351, 378, 481, 518, 546, 666, 702, 777, 819, 962, 999, 1443, 1554, 1638, 1998, 2331, 2457, 2886, 3367, 4329, 4662, 4914, 6734, 6993, 8658, 10101, 12987, 13986, 20202, 25974, 30303, 60606, 90909, 181818]

約数ペア:

[(1, 181818), (2, 90909), (3, 60606), (6, 30303), (7, 25974), (9, 20202), (13, 13986), (14, 12987), (18, 10101), (21, 8658), (26, 6993), (27, 6734), (37, 4914), (39, 4662), (42, 4329), (54, 3367), (63, 2886), (74, 2457), (78, 2331), (91, 1998), (111, 1638), (117, 1554), (126, 1443), (182, 999), (189, 962), (222, 819), (234, 777), (259, 702), (273, 666), (333, 546), (351, 518), (378, 481)]