20400720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{167}}^1\times {\mathrm{509}}^1$

素因数の和:692

約数の個数: 80

約数和(自身を含む): 63745920

約数和(自身を除く): 43345200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 167, 240, 334, 501, 509, 668, 835, 1002, 1018, 1336, 1527, 1670, 2004, 2036, 2505, 2545, 2672, 3054, 3340, 4008, 4072, 5010, 5090, 6108, 6680, 7635, 8016, 8144, 10020, 10180, 12216, 13360, 15270, 20040, 20360, 24432, 30540, 40080, 40720, 61080, 85003, 122160, 170006, 255009, 340012, 425015, 510018, 680024, 850030, 1020036, 1275045, 1360048, 1700060, 2040072, 2550090, 3400120, 4080144, 5100180, 6800240, 10200360, 20400720]

約数ペア:

[(1, 20400720), (2, 10200360), (3, 6800240), (4, 5100180), (5, 4080144), (6, 3400120), (8, 2550090), (10, 2040072), (12, 1700060), (15, 1360048), (16, 1275045), (20, 1020036), (24, 850030), (30, 680024), (40, 510018), (48, 425015), (60, 340012), (80, 255009), (120, 170006), (167, 122160), (240, 85003), (334, 61080), (501, 40720), (509, 40080), (668, 30540), (835, 24432), (1002, 20360), (1018, 20040), (1336, 15270), (1527, 13360), (1670, 12216), (2004, 10180), (2036, 10020), (2505, 8144), (2545, 8016), (2672, 7635), (3054, 6680), (3340, 6108), (4008, 5090), (4072, 5010)]