21879760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{439}}^1$

素因数の和:548

約数の個数: 80

約数和(自身を含む): 58924800

約数和(自身を除く): 37045040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 89, 112, 140, 178, 280, 356, 439, 445, 560, 623, 712, 878, 890, 1246, 1424, 1756, 1780, 2195, 2492, 3073, 3115, 3512, 3560, 4390, 4984, 6146, 6230, 7024, 7120, 8780, 9968, 12292, 12460, 15365, 17560, 24584, 24920, 30730, 35120, 39071, 49168, 49840, 61460, 78142, 122920, 156284, 195355, 245840, 273497, 312568, 390710, 546994, 625136, 781420, 1093988, 1367485, 1562840, 2187976, 2734970, 3125680, 4375952, 5469940, 10939880, 21879760]

約数ペア:

[(1, 21879760), (2, 10939880), (4, 5469940), (5, 4375952), (7, 3125680), (8, 2734970), (10, 2187976), (14, 1562840), (16, 1367485), (20, 1093988), (28, 781420), (35, 625136), (40, 546994), (56, 390710), (70, 312568), (80, 273497), (89, 245840), (112, 195355), (140, 156284), (178, 122920), (280, 78142), (356, 61460), (439, 49840), (445, 49168), (560, 39071), (623, 35120), (712, 30730), (878, 24920), (890, 24584), (1246, 17560), (1424, 15365), (1756, 12460), (1780, 12292), (2195, 9968), (2492, 8780), (3073, 7120), (3115, 7024), (3512, 6230), (3560, 6146), (4390, 4984)]