19743880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{883}}^1$

素因数の和:950

約数の個数: 64

約数和(自身を含む): 49008960

約数和(自身を除く): 29265080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 883, 1118, 1720, 1766, 2236, 2795, 3532, 4415, 4472, 5590, 7064, 8830, 11180, 11479, 17660, 22360, 22958, 35320, 37969, 45916, 57395, 75938, 91832, 114790, 151876, 189845, 229580, 303752, 379690, 459160, 493597, 759380, 987194, 1518760, 1974388, 2467985, 3948776, 4935970, 9871940, 19743880]

約数ペア:

[(1, 19743880), (2, 9871940), (4, 4935970), (5, 3948776), (8, 2467985), (10, 1974388), (13, 1518760), (20, 987194), (26, 759380), (40, 493597), (43, 459160), (52, 379690), (65, 303752), (86, 229580), (104, 189845), (130, 151876), (172, 114790), (215, 91832), (260, 75938), (344, 57395), (430, 45916), (520, 37969), (559, 35320), (860, 22958), (883, 22360), (1118, 17660), (1720, 11479), (1766, 11180), (2236, 8830), (2795, 7064), (3532, 5590), (4415, 4472)]