20001680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13159}}^1$

素因数の和:13191

約数の個数: 40

約数和(自身を含む): 48955200

約数和(自身を除く): 28953520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13159, 26318, 52636, 65795, 105272, 131590, 210544, 250021, 263180, 500042, 526360, 1000084, 1052720, 1250105, 2000168, 2500210, 4000336, 5000420, 10000840, 20001680]

約数ペア:

[(1, 20001680), (2, 10000840), (4, 5000420), (5, 4000336), (8, 2500210), (10, 2000168), (16, 1250105), (19, 1052720), (20, 1000084), (38, 526360), (40, 500042), (76, 263180), (80, 250021), (95, 210544), (152, 131590), (190, 105272), (304, 65795), (380, 52636), (760, 26318), (1520, 13159)]