21183760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20369}}^1$

素因数の和:20395

約数の個数: 40

約数和(自身を含む): 53043480

約数和(自身を除く): 31859720

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20369, 40738, 81476, 101845, 162952, 203690, 264797, 325904, 407380, 529594, 814760, 1059188, 1323985, 1629520, 2118376, 2647970, 4236752, 5295940, 10591880, 21183760]

約数ペア:

[(1, 21183760), (2, 10591880), (4, 5295940), (5, 4236752), (8, 2647970), (10, 2118376), (13, 1629520), (16, 1323985), (20, 1059188), (26, 814760), (40, 529594), (52, 407380), (65, 325904), (80, 264797), (104, 203690), (130, 162952), (208, 101845), (260, 81476), (520, 40738), (1040, 20369)]