20657680

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:248

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 30410480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 103, 109, 115, 184, 206, 218, 230, 368, 412, 436, 460, 515, 545, 824, 872, 920, 1030, 1090, 1648, 1744, 1840, 2060, 2180, 2369, 2507, 4120, 4360, 4738, 5014, 8240, 8720, 9476, 10028, 11227, 11845, 12535, 18952, 20056, 22454, 23690, 25070, 37904, 40112, 44908, 47380, 50140, 56135, 89816, 94760, 100280, 112270, 179632, 189520, 200560, 224540, 258221, 449080, 516442, 898160, 1032884, 1291105, 2065768, 2582210, 4131536, 5164420, 10328840, 20657680]

約数ペア:

[(1, 20657680), (2, 10328840), (4, 5164420), (5, 4131536), (8, 2582210), (10, 2065768), (16, 1291105), (20, 1032884), (23, 898160), (40, 516442), (46, 449080), (80, 258221), (92, 224540), (103, 200560), (109, 189520), (115, 179632), (184, 112270), (206, 100280), (218, 94760), (230, 89816), (368, 56135), (412, 50140), (436, 47380), (460, 44908), (515, 40112), (545, 37904), (824, 25070), (872, 23690), (920, 22454), (1030, 20056), (1090, 18952), (1648, 12535), (1744, 11845), (1840, 11227), (2060, 10028), (2180, 9476), (2369, 8720), (2507, 8240), (4120, 5014), (4360, 4738)]