20910728

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{683}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 40629600

約数和(自身を除く): 19718872

約数列:

[1, 2, 4, 8, 43, 86, 89, 172, 178, 344, 356, 683, 712, 1366, 2732, 3827, 5464, 7654, 15308, 29369, 30616, 58738, 60787, 117476, 121574, 234952, 243148, 486296, 2613841, 5227682, 10455364, 20910728]

約数ペア:

[(1, 20910728), (2, 10455364), (4, 5227682), (8, 2613841), (43, 486296), (86, 243148), (89, 234952), (172, 121574), (178, 117476), (344, 60787), (356, 58738), (683, 30616), (712, 29369), (1366, 15308), (2732, 7654), (3827, 5464)]