81480280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{733}}^1$

素因数の和:1148

約数の個数: 64

約数和(自身を含む): 210335040

約数和(自身を除く): 128854760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 397, 733, 794, 1466, 1588, 1985, 2779, 2932, 3176, 3665, 3970, 5131, 5558, 5864, 7330, 7940, 10262, 11116, 13895, 14660, 15880, 20524, 22232, 25655, 27790, 29320, 41048, 51310, 55580, 102620, 111160, 205240, 291001, 582002, 1164004, 1455005, 2037007, 2328008, 2910010, 4074014, 5820020, 8148028, 10185035, 11640040, 16296056, 20370070, 40740140, 81480280]

約数ペア:

[(1, 81480280), (2, 40740140), (4, 20370070), (5, 16296056), (7, 11640040), (8, 10185035), (10, 8148028), (14, 5820020), (20, 4074014), (28, 2910010), (35, 2328008), (40, 2037007), (56, 1455005), (70, 1164004), (140, 582002), (280, 291001), (397, 205240), (733, 111160), (794, 102620), (1466, 55580), (1588, 51310), (1985, 41048), (2779, 29320), (2932, 27790), (3176, 25655), (3665, 22232), (3970, 20524), (5131, 15880), (5558, 14660), (5864, 13895), (7330, 11116), (7940, 10262)]