81977778

素因数分解:

$2^1\times 3^3\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{607}}^1$

素因数の和:720

約数の個数: 64

約数和(自身を含む): 189987840

約数和(自身を除く): 108010062

約数列:

[1, 2, 3, 6, 9, 18, 27, 41, 54, 61, 82, 122, 123, 183, 246, 366, 369, 549, 607, 738, 1098, 1107, 1214, 1647, 1821, 2214, 2501, 3294, 3642, 5002, 5463, 7503, 10926, 15006, 16389, 22509, 24887, 32778, 37027, 45018, 49774, 67527, 74054, 74661, 111081, 135054, 149322, 222162, 223983, 333243, 447966, 666486, 671949, 999729, 1343898, 1518107, 1999458, 3036214, 4554321, 9108642, 13662963, 27325926, 40988889, 81977778]

約数ペア:

[(1, 81977778), (2, 40988889), (3, 27325926), (6, 13662963), (9, 9108642), (18, 4554321), (27, 3036214), (41, 1999458), (54, 1518107), (61, 1343898), (82, 999729), (122, 671949), (123, 666486), (183, 447966), (246, 333243), (366, 223983), (369, 222162), (549, 149322), (607, 135054), (738, 111081), (1098, 74661), (1107, 74054), (1214, 67527), (1647, 49774), (1821, 45018), (2214, 37027), (2501, 32778), (3294, 24887), (3642, 22509), (5002, 16389), (5463, 15006), (7503, 10926)]