19914520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12143}}^1$

素因数の和:12195

約数の個数: 32

約数和(自身を含む): 45904320

約数和(自身を除く): 25989800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12143, 24286, 48572, 60715, 97144, 121430, 242860, 485720, 497863, 995726, 1991452, 2489315, 3982904, 4978630, 9957260, 19914520]

約数ペア:

[(1, 19914520), (2, 9957260), (4, 4978630), (5, 3982904), (8, 2489315), (10, 1991452), (20, 995726), (40, 497863), (41, 485720), (82, 242860), (164, 121430), (205, 97144), (328, 60715), (410, 48572), (820, 24286), (1640, 12143)]