989456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:159

約数の個数: 40

約数和(自身を含む): 2124864

約数和(自身を除く): 1135408

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 71, 104, 134, 142, 208, 268, 284, 536, 568, 871, 923, 1072, 1136, 1742, 1846, 3484, 3692, 4757, 6968, 7384, 9514, 13936, 14768, 19028, 38056, 61841, 76112, 123682, 247364, 494728, 989456]

約数ペア:

[(1, 989456), (2, 494728), (4, 247364), (8, 123682), (13, 76112), (16, 61841), (26, 38056), (52, 19028), (67, 14768), (71, 13936), (104, 9514), (134, 7384), (142, 6968), (208, 4757), (268, 3692), (284, 3484), (536, 1846), (568, 1742), (871, 1136), (923, 1072)]