19181840

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1471}}^1$

素因数の和:1647

約数の個数: 40

約数和(自身を含む): 44901888

約数和(自身を除く): 25720048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1471, 1630, 2608, 2942, 3260, 5884, 6520, 7355, 11768, 13040, 14710, 23536, 29420, 58840, 117680, 239773, 479546, 959092, 1198865, 1918184, 2397730, 3836368, 4795460, 9590920, 19181840]

約数ペア:

[(1, 19181840), (2, 9590920), (4, 4795460), (5, 3836368), (8, 2397730), (10, 1918184), (16, 1198865), (20, 959092), (40, 479546), (80, 239773), (163, 117680), (326, 58840), (652, 29420), (815, 23536), (1304, 14710), (1471, 13040), (1630, 11768), (2608, 7355), (2942, 6520), (3260, 5884)]