19497680

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{971}}^1$

素因数の和:1235

約数の個数: 40

約数和(自身を含む): 45559584

約数和(自身を除く): 26061904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 971, 1004, 1255, 1942, 2008, 2510, 3884, 4016, 4855, 5020, 7768, 9710, 10040, 15536, 19420, 20080, 38840, 77680, 243721, 487442, 974884, 1218605, 1949768, 2437210, 3899536, 4874420, 9748840, 19497680]

約数ペア:

[(1, 19497680), (2, 9748840), (4, 4874420), (5, 3899536), (8, 2437210), (10, 1949768), (16, 1218605), (20, 974884), (40, 487442), (80, 243721), (251, 77680), (502, 38840), (971, 20080), (1004, 19420), (1255, 15536), (1942, 10040), (2008, 9710), (2510, 7768), (3884, 5020), (4016, 4855)]