256824321

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{2957}}^1$

素因数の和:3121

約数の個数: 32

約数和(自身を含む): 393579648

約数和(自身を除く): 136755327

約数列:

[1, 3, 13, 17, 39, 51, 131, 221, 393, 663, 1703, 2227, 2957, 5109, 6681, 8871, 28951, 38441, 50269, 86853, 115323, 150807, 387367, 653497, 1162101, 1960491, 5035771, 6585239, 15107313, 19755717, 85608107, 256824321]

約数ペア:

[(1, 256824321), (3, 85608107), (13, 19755717), (17, 15107313), (39, 6585239), (51, 5035771), (131, 1960491), (221, 1162101), (393, 653497), (663, 387367), (1703, 150807), (2227, 115323), (2957, 86853), (5109, 50269), (6681, 38441), (8871, 28951)]