20808240

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{277}}^1\times {\mathrm{313}}^1$

素因数の和:606

約数の個数: 80

約数和(自身を含む): 64945248

約数和(自身を除く): 44137008

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 277, 313, 554, 626, 831, 939, 1108, 1252, 1385, 1565, 1662, 1878, 2216, 2504, 2770, 3130, 3324, 3756, 4155, 4432, 4695, 5008, 5540, 6260, 6648, 7512, 8310, 9390, 11080, 12520, 13296, 15024, 16620, 18780, 22160, 25040, 33240, 37560, 66480, 75120, 86701, 173402, 260103, 346804, 433505, 520206, 693608, 867010, 1040412, 1300515, 1387216, 1734020, 2080824, 2601030, 3468040, 4161648, 5202060, 6936080, 10404120, 20808240]

約数ペア:

[(1, 20808240), (2, 10404120), (3, 6936080), (4, 5202060), (5, 4161648), (6, 3468040), (8, 2601030), (10, 2080824), (12, 1734020), (15, 1387216), (16, 1300515), (20, 1040412), (24, 867010), (30, 693608), (40, 520206), (48, 433505), (60, 346804), (80, 260103), (120, 173402), (240, 86701), (277, 75120), (313, 66480), (554, 37560), (626, 33240), (831, 25040), (939, 22160), (1108, 18780), (1252, 16620), (1385, 15024), (1565, 13296), (1662, 12520), (1878, 11080), (2216, 9390), (2504, 8310), (2770, 7512), (3130, 6648), (3324, 6260), (3756, 5540), (4155, 5008), (4432, 4695)]