81857178

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{379}}^1$

素因数の和:484

約数の個数: 72

約数和(自身を含む): 195268320

約数和(自身を除く): 113411142

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 71, 78, 117, 142, 169, 213, 234, 338, 379, 426, 507, 639, 758, 923, 1014, 1137, 1278, 1521, 1846, 2274, 2769, 3042, 3411, 4927, 5538, 6822, 8307, 9854, 11999, 14781, 16614, 23998, 26909, 29562, 35997, 44343, 53818, 64051, 71994, 80727, 88686, 107991, 128102, 161454, 192153, 215982, 242181, 349817, 384306, 484362, 576459, 699634, 1049451, 1152918, 2098902, 3148353, 4547621, 6296706, 9095242, 13642863, 27285726, 40928589, 81857178]

約数ペア:

[(1, 81857178), (2, 40928589), (3, 27285726), (6, 13642863), (9, 9095242), (13, 6296706), (18, 4547621), (26, 3148353), (39, 2098902), (71, 1152918), (78, 1049451), (117, 699634), (142, 576459), (169, 484362), (213, 384306), (234, 349817), (338, 242181), (379, 215982), (426, 192153), (507, 161454), (639, 128102), (758, 107991), (923, 88686), (1014, 80727), (1137, 71994), (1278, 64051), (1521, 53818), (1846, 44343), (2274, 35997), (2769, 29562), (3042, 26909), (3411, 23998), (4927, 16614), (5538, 14781), (6822, 11999), (8307, 9854)]