80775920

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12781}}^1$

素因数の和:12873

約数の個数: 40

約数和(自身を含む): 190196160

約数和(自身を除く): 109420240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 12781, 25562, 51124, 63905, 102248, 127810, 204496, 255620, 511240, 1009699, 1022480, 2019398, 4038796, 5048495, 8077592, 10096990, 16155184, 20193980, 40387960, 80775920]

約数ペア:

[(1, 80775920), (2, 40387960), (4, 20193980), (5, 16155184), (8, 10096990), (10, 8077592), (16, 5048495), (20, 4038796), (40, 2019398), (79, 1022480), (80, 1009699), (158, 511240), (316, 255620), (395, 204496), (632, 127810), (790, 102248), (1264, 63905), (1580, 51124), (3160, 25562), (6320, 12781)]