81857916

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2069}}^1$

素因数の和:2243

約数の個数: 72

約数和(自身を含む): 238099680

約数和(自身を除く): 156241764

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 157, 252, 314, 471, 628, 942, 1099, 1413, 1884, 2069, 2198, 2826, 3297, 4138, 4396, 5652, 6207, 6594, 8276, 9891, 12414, 13188, 14483, 18621, 19782, 24828, 28966, 37242, 39564, 43449, 57932, 74484, 86898, 130347, 173796, 260694, 324833, 521388, 649666, 974499, 1299332, 1948998, 2273831, 2923497, 3897996, 4547662, 5846994, 6821493, 9095324, 11693988, 13642986, 20464479, 27285972, 40928958, 81857916]

約数ペア:

[(1, 81857916), (2, 40928958), (3, 27285972), (4, 20464479), (6, 13642986), (7, 11693988), (9, 9095324), (12, 6821493), (14, 5846994), (18, 4547662), (21, 3897996), (28, 2923497), (36, 2273831), (42, 1948998), (63, 1299332), (84, 974499), (126, 649666), (157, 521388), (252, 324833), (314, 260694), (471, 173796), (628, 130347), (942, 86898), (1099, 74484), (1413, 57932), (1884, 43449), (2069, 39564), (2198, 37242), (2826, 28966), (3297, 24828), (4138, 19782), (4396, 18621), (5652, 14483), (6207, 13188), (6594, 12414), (8276, 9891)]