1781409940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{389}}^1\times {\mathrm{13469}}^1$

素因数の和:13884

約数の個数: 48

約数和(自身を含む): 3971494800

約数和(自身を除く): 2190084860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 389, 778, 1556, 1945, 3890, 6613, 7780, 13226, 13469, 26452, 26938, 33065, 53876, 66130, 67345, 132260, 134690, 228973, 269380, 457946, 915892, 1144865, 2289730, 4579460, 5239441, 10478882, 20957764, 26197205, 52394410, 89070497, 104788820, 178140994, 356281988, 445352485, 890704970, 1781409940]

約数ペア:

[(1, 1781409940), (2, 890704970), (4, 445352485), (5, 356281988), (10, 178140994), (17, 104788820), (20, 89070497), (34, 52394410), (68, 26197205), (85, 20957764), (170, 10478882), (340, 5239441), (389, 4579460), (778, 2289730), (1556, 1144865), (1945, 915892), (3890, 457946), (6613, 269380), (7780, 228973), (13226, 134690), (13469, 132260), (26452, 67345), (26938, 66130), (33065, 53876)]