81872140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4397}}^1$

素因数の和:4439

約数の個数: 72

約数和(自身を含む): 210576240

約数和(自身を除く): 128704100

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1330, 1862, 2660, 3724, 4397, 4655, 8794, 9310, 17588, 18620, 21985, 30779, 43970, 61558, 83543, 87940, 123116, 153895, 167086, 215453, 307790, 334172, 417715, 430906, 584801, 615580, 835430, 861812, 1077265, 1169602, 1670860, 2154530, 2339204, 2924005, 4093607, 4309060, 5848010, 8187214, 11696020, 16374428, 20468035, 40936070, 81872140]

約数ペア:

[(1, 81872140), (2, 40936070), (4, 20468035), (5, 16374428), (7, 11696020), (10, 8187214), (14, 5848010), (19, 4309060), (20, 4093607), (28, 2924005), (35, 2339204), (38, 2154530), (49, 1670860), (70, 1169602), (76, 1077265), (95, 861812), (98, 835430), (133, 615580), (140, 584801), (190, 430906), (196, 417715), (245, 334172), (266, 307790), (380, 215453), (490, 167086), (532, 153895), (665, 123116), (931, 87940), (980, 83543), (1330, 61558), (1862, 43970), (2660, 30779), (3724, 21985), (4397, 18620), (4655, 17588), (8794, 9310)]