81302560

素因数分解:

$2^5\times 5^1\times {\mathrm{269}}^1\times {\mathrm{1889}}^1$

素因数の和:2173

約数の個数: 48

約数和(自身を含む): 192893400

約数和(自身を除く): 111590840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 269, 538, 1076, 1345, 1889, 2152, 2690, 3778, 4304, 5380, 7556, 8608, 9445, 10760, 15112, 18890, 21520, 30224, 37780, 43040, 60448, 75560, 151120, 302240, 508141, 1016282, 2032564, 2540705, 4065128, 5081410, 8130256, 10162820, 16260512, 20325640, 40651280, 81302560]

約数ペア:

[(1, 81302560), (2, 40651280), (4, 20325640), (5, 16260512), (8, 10162820), (10, 8130256), (16, 5081410), (20, 4065128), (32, 2540705), (40, 2032564), (80, 1016282), (160, 508141), (269, 302240), (538, 151120), (1076, 75560), (1345, 60448), (1889, 43040), (2152, 37780), (2690, 30224), (3778, 21520), (4304, 18890), (5380, 15112), (7556, 10760), (8608, 9445)]