20278680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{347}}^1\times {\mathrm{487}}^1$

素因数の和:848

約数の個数: 64

約数和(自身を含む): 61136640

約数和(自身を除く): 40857960

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 347, 487, 694, 974, 1041, 1388, 1461, 1735, 1948, 2082, 2435, 2776, 2922, 3470, 3896, 4164, 4870, 5205, 5844, 6940, 7305, 8328, 9740, 10410, 11688, 13880, 14610, 19480, 20820, 29220, 41640, 58440, 168989, 337978, 506967, 675956, 844945, 1013934, 1351912, 1689890, 2027868, 2534835, 3379780, 4055736, 5069670, 6759560, 10139340, 20278680]

約数ペア:

[(1, 20278680), (2, 10139340), (3, 6759560), (4, 5069670), (5, 4055736), (6, 3379780), (8, 2534835), (10, 2027868), (12, 1689890), (15, 1351912), (20, 1013934), (24, 844945), (30, 675956), (40, 506967), (60, 337978), (120, 168989), (347, 58440), (487, 41640), (694, 29220), (974, 20820), (1041, 19480), (1388, 14610), (1461, 13880), (1735, 11688), (1948, 10410), (2082, 9740), (2435, 8328), (2776, 7305), (2922, 6940), (3470, 5844), (3896, 5205), (4164, 4870)]