209564225

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{193}}^1\times {\mathrm{257}}^1$

素因数の和:486

約数の個数: 36

約数和(自身を含む): 283944996

約数和(自身を除く): 74380771

約数列:

[1, 5, 13, 25, 65, 169, 193, 257, 325, 845, 965, 1285, 2509, 3341, 4225, 4825, 6425, 12545, 16705, 32617, 43433, 49601, 62725, 83525, 163085, 217165, 248005, 644813, 815425, 1085825, 1240025, 3224065, 8382569, 16120325, 41912845, 209564225]

約数ペア:

[(1, 209564225), (5, 41912845), (13, 16120325), (25, 8382569), (65, 3224065), (169, 1240025), (193, 1085825), (257, 815425), (325, 644813), (845, 248005), (965, 217165), (1285, 163085), (2509, 83525), (3341, 62725), (4225, 49601), (4825, 43433), (6425, 32617), (12545, 16705)]